after it was picked.

Whitney also came up with the idea of

interchangeable parts. Before that time

a worker who was skilled at making one

type of product would spend a great

deal of time making a single product by

hand. Whitney discovered that a

machine could make many copies of

the individual parts of a product at

once; the parts could then be assembled

by any worker. This meant that many

goods could be produced quickly. Soon

factories were set up to produce these

goods.

Factories and the machines in them

needed power sources. In the early

1700s people discovered how to build

steam engines. In the late 1700s James

Watt invented a steam engine that could

run factory machines.

The Industrial Revolution soon spread

to all kinds of production. Farmers, for

instance, began to invent new machines

to plow fields and plant crops.

Factory owners needed ways to bring

large amounts of raw materials to their

factories. They also needed ways to

deliver the products that they made to

customers in many places. Their

demands led to many improvements in

the transportation system. The U.S.

inventor Robert Fulton perfected the

steamboat in 1807. The British inventor

George Stephenson put a steam engine

on wheels and put the wheels on rails in

1825. The result was a railroad.

Before the Industrial Revolution people

made clothing and other products at home.

To make cloth they had to spin wool into

yarn on a spinning wheel and then weave

the yarn into cloth by hand.

BRITANNICA STUDENT ENCYCLOPEDIA Industrial Revolution 133

Impact on Society

By the late 1700s, many people could

no longer earn their living in the countryside.

People moved from farms and

villages into bigger towns and cities to

find work. Cities grew larger, but they

were often dirty, crowded, and

unhealthy.

Although the machines made the work

easier in some ways, factory work created

many problems for the workers.

Machines increased production. This

meant that products were cheaper to

make and also cheaper to buy. Factory

owners grew rich. Factory employees,

however, did not earn much, and the

work was often dangerous. Many

worked 12 to 14 hours a day. Men,

women, and even small children worked

in factories.

Workers sought to win improved conditions

and wages through labor unions.

These organizations helped create laws

that protected the workers. They limited

the number of hours they had to work

and guaranteed that they would be paid

a certain amount.

#More to explore

Industry • Technology and Invention

Industry

An industry is a group of businesses that

make or sell similar products or perform

similar services. Farms are part of the

agricultural industry. Factories are part

of manufacturing industries. Schools are

part of the educational services industry.

Industries are important to every country’s

economy.

The first human industry was agriculture.

Most developing countries still

depend on agriculture as their main

industry.

Another early industry was mining, or

the removal of metals and other materials

from the earth. Since prehistoric

During the Industrial Revolution people

invented looms that ran on steam or other

power sources. These power looms wove

cloth faster than ever before.

Manufacturing plants produce many different

kinds of products, including foods and

beverages.

134 Industry BRITANNICA STUDENT ENCYCLOPEDIA

times humans have mined metals to

make tools and other goods.

Manufacturing industries make goods

from the raw materials produced by

agriculture and mining. Manufacturers

make such everyday items as clothing,

cars, computers, paper, and processed

food. Another manufacturing industry is

construction. Construction workers

build houses, office buildings, roads,

bridges, and sewers.

Service industries dominate the economies

of developed countries.Workers in

service industries do not provide actual

goods. Instead they perform actions.

Teachers, car mechanics, barbers, housepainters,

bankers, and actors are all in

service industries. One of the most

important service industries is telecommunications.

By connecting telephones

and computers, telecommunications

allows people to talk across great distances.

#More to explore

Agriculture • Economics

• Manufacturing • Mining

• Telecommunication

Indus Valley

Civilization

One of the first civilizations in the world

developed in the valley of the Indus

River in Asia. It occupied both sides of

what is now the border between Pakistan

and India. The Indus Valley civilization

lasted from about 2500 BC to about

1700 BC.

Society and Culture

The biggest cities of the Indus Valley

civilization were Harappa and Mohenjodaro.

Both were in what is now Pakistan.

Harappa might have had as many

as 35,000 people. Mohenjo-daro was

even larger. There were also at least 60

smaller settlements along the Indus

River and the Arabian Sea.

Farming was important to the Indus

Valley civilization. People ran water

channels from rivers to the fields. The

Indus people were among the first to

grow cotton and use it to make cloth.

They also might have been the first

people to raise chickens.

Indus merchants used carved stones

called seals to mark their goods. Many

seals show pictures of animals and a

form of writing. These seals have been

found in Mesopotamia (in what is now

The people of the Indus Valley carved many

objects, including mazes and dice.

BRITANNICA STUDENT ENCYCLOPEDIA Indus Valley Civilization 135

Iraq). This means that the two regions

might have traded with each other.

History

Beginning in about 5000 BC, farmers

near what is now Iran began to gather in

villages. In about 3500 BC settlers began

to move eastward into the Indus Valley.

By about 2500 BC the Indus Valley civilization

had developed at Harappa and

other sites. Scholars do not know much

about Indus Valley history because they

do not understand the writing system.

The Indus Valley civilization probably

broke down in stages between 2000 BC

and 1700 BC. Some historians blame

invaders from the west, probably a

group known as Aryans. Climate

change, floods, and diseases also might

have hurt the civilization.

#More to explore

Civilization • Indus River

Influenza

Influenza, or flu, is a common illness of

the respiratory, or breathing, system.

Germs called viruses cause influenza.

The viruses invade the nose, throat, and

lungs.

The signs of influenza come on suddenly.

They include body aches, chills,

and fever. The person also may cough

and sneeze and have a sore throat.

People with influenza often become very

tired. Some may have a headache. After

three or four days most people start to

get better. But flu can be a serious danger

to people who are very old or very

young or have other health problems.

Such people can get pneumonia and

bronchitis.

Influenza viruses come in many types.

The most dangerous types can kill even

young and healthy people. Luckily, they

do not cause outbreaks very often. But

in 1918–19 an outbreak of influenza

A seal often had animal pictures and writing

carved into it.

Temporary hospitals took in many influenza

patients during the 1918–19 outbreak.

136 Influenza BRITANNICA STUDENT ENCYCLOPEDIA

killed more than 20 million people

throughout the world.

People with influenza should get plenty

of rest and drink lots of fluids. In the

late 20th century scientists developed

medicines to treat influenza.

People can protect themselves from

influenza viruses by getting a shot of a

substance called a vaccine. Because the

viruses change constantly, a person must

get a vaccination every year to stay protected.

#More to explore

Pneumonia • Respiratory System

• Vaccine • Virus

Inquisition

In the 1200s the Roman Catholic

church set up a court called the Inquisition.

The Inquisition examined people

accused of heresy, or going against

church teachings.

The officials in charge of the Inquisition

were called inquisitors. Inquisitors first

gave an accused person a chance to confess.

Some inquisitors tortured people to

get them to confess. Even innocent

people often confessed under torture.

People who did not confess received

trials. Then inquisitors announced punishments

for the guilty in a big ceremony.

Punishments included fines,

prison, or death.

Pope Gregory IX started the Inquisition

in 1231. The Inquisition operated in

several countries. It was particularly

harsh in Spain in the late 1400s, under

King Ferdinand and Queen Isabella. A

Spanish inquisitor named Tomas de

Torquemada burned about 2,000 people

at the stake. Torquemada also persuaded

Ferdinand and Isabella to force more

than 160,000 Jews out of Spain.

The Inquisition had some famous victims.

One of them was the French heroine

Joan of Arc. She was burned at the

stake in 1431 partly because she claimed

that she had received messages directly

from God. Another was the Italian scientist

Galileo. In the early 1600s he was

punished for teaching that Earth

revolves around the sun. Galileo was not

put in prison, but he was not allowed to

travel freely outside his house either. The

Inquisition continued in a milder form

until 1908.

#More to explore

Ferdinand and Isabella • Galileo

• Roman Catholicism

A painting shows inquisitors questioning a

man. Inquisitors punished people who went

against the teachings of the Roman Catholic

church.

BRITANNICA STUDENT ENCYCLOPEDIA Inquisition 137

Insect

The insects are the largest group of animals.

In fact, about 75 percent of all

animals are insects. Insects developed on

Earth long before humans did. Today

there are about 1 million known species,

or types, of insect. And scientists are

constantly discovering new species. Butterflies,

beetles, ants, flies, grasshoppers,

silverfish, and bees are all insects.

Where Insects Live

Insects live all over the world. They can

survive in almost any place where food is

available. For instance, insects can be

found in cold regions, hot rain forests,

deserts, mountains, caves, and freshwater.

A few kinds even live in salt water.

Physical Features

Insects are members of a larger group

called the arthropods. This group also

includes spiders, ticks, centipedes, lobsters,

and crabs. Like all arthropods,

insects have a body that is divided into

segments, or sections. They also lack a

skeleton inside the body. Instead, insects

and other arthropods have a covering on

the outside of the body called an exoskeleton.

This exoskeleton protects the

insect’s body.

Unlike other arthropods, insects have

three major body segments. Insects also

have six legs. This is one way that insects

differ from spiders, which have eight

legs. Insects also have at least one pair of

antennas, or feelers.

The three major segments of an insect

body are the head, the thorax, and the

abdomen. The head contains the insect’s

antennas, mouthparts, and eyes. The

adults of many species have two kinds of

eyes, simple and compound. Compound

eyes have many lenslike parts. Each of

these receives a separate image. The

images are combined into a single picture

in the insect’s brain.

The thorax has three pairs of legs and

usually two pairs of wings. But some

insects have only one pair of wings or no

wings at all.

Honeybees are well-known insects. They

build honeycombs to store their honey.

The body of an insect has three main segments:

the head, the thorax, and the abdomen.

The legs and the wings are connected

to the thorax.

138 Insect BRITANNICA STUDENT ENCYCLOPEDIA

The abdomen is made up of as many as

11 segments. It contains organs that

digest food, push out wastes, and help

the insect reproduce.

Insects vary greatly in size. Most insects

are small, usually less than 0.2 inch (6

millimeters) long. However, some

insects called walkingsticks can grow to

more than 12 inches (30 centimeters) in

length.

Behavior

Insects have a variety of ways to protect

themselves from their enemies. For

example, some insects hide by blending

in to their surroundings. Many moths

have a similar coloring to the bark of the

trees on which they rest. Beetles have a

very hard body armor to protect them.

Some insects bite or sting their enemies.

Some kinds produce poison.

Some kinds of insects live alone, while

others live in groups. Termites, ants, and

some bees and wasps live in very organized

groups. Each individual has a particular

job to do for the group. For

example, some termites are born to be

soldiers or workers. Other termites will

be the king and queen.

Insects eat a great variety of plants, animals,

and other living things. Certain

insects, such as fleas and lice, live on the

body of another animal. They get all

their food from that animal’s body. Such

insects are called parasites.

Life Cycle

Most insects hatch from eggs. A few

kinds are born live. An insect’s exoskeleton

cannot grow. Instead, as the insect

grows, this covering splits apart and falls

off from time to time. The insect grows

a new covering. This process is called

molting.

There are two basic life cycles found in

insects. Some insects are born in nearly

the same form they will have as an adult.

The insect grows and molts, eventually

becoming an adult. Grasshoppers and

cockroaches go through this kind of

growth process.

Other types undergo a complete change,

or metamorphosis. After they hatch,

they begin life in a form called a larva. It

is completely unlike the adult form. For

instance, a larva may look more like a

worm than an insect. The larva eats a

great deal and molts several times. It

then enters a resting stage in a form

Scientists who

study insects

are called

entomologists.

As an insect grows, it sheds its

exoskeleton from time to time.

The insect then forms a new,

larger exoskeleton.

BRITANNICA STUDENT ENCYCLOPEDIA Insect 139

called a pupa. The pupa’s body changes

greatly during this stage. It develops all

of the features of the adult, including

wings and legs. When this stage is complete,

the adult emerges from the pupa.

Bees, butterflies, and moths are some

insects that develop this way.

Helpful and Harmful Insects

Many insects are helpful to humans and

other animals. Some kinds eat other

insects that are pests. Insects are also

food for other animals. Some insects

produce valuable products such as

honey, silk, and dyes.

Many flowering plants depend on

insects such as bees to help them reproduce.

As insects feed on flowers, they

spread a substance called pollen from

the male parts of flowers to the female

parts. This allows the female parts to

make seeds.

Insects can also be pests. Some insects

sting or bite people or other animals.

Many insects can spread diseases to

people, other animals, and plants. And

some harmful insects eat crops, wood,

clothing, and carpet.

#More to explore

Animal • Metamorphosis • Parasite

• Pollen • Protective Coloration

Internal-

Combustion

Engine

Engines powered by internal combustion

run cars, airplanes, lawn mowers,

and other machines. Combustion means

“burning.” Fuel, usually gasoline, burns

inside an internal-combustion engine to

make it work. Compared to earlier

steam engines, internal-combustion

An internal-combustion engine goes through four strokes: intake, compression, combustion

(power), and exhaust. As the piston moves during each stroke, it turns the crankshaft.

140 Internal-Combustion Engine BRITANNICA STUDENT ENCYCLOPEDIA

engines are lighter and more powerful.

They made automobiles possible.

How Internal-Combustion

EnginesWork

In many internal-combustion engines a

moving part called a piston slides up and

down in a cylinder. Most car engines

have four to eight cylinders. Valves at

the top of a cylinder let in fuel and air

and allow burned fuel to escape. Also at

the top of the cylinder is a spark plug.

The spark plug ignites, or sets fire to,

the fuel.

As the engine runs, it goes through a

cycle of four strokes: intake, compression,

combustion, and exhaust. During

the intake stroke, a valve opens and the

cylinder fills with fresh fuel and air.

Next, during the compression stroke,

the piston moves toward the top of the

cylinder. The piston creates pressure by

squeezing the fuel and air into a smaller

and smaller space with both valves

closed. When the piston can go no

higher, a spark from the spark plug

ignites the fuel. Then, in the combustion

stroke (also called the power

stroke), an explosion of burning fuel

forces the piston back down. During the

exhaust stroke, a second valve opens and

the piston rises up. It pushes the hot

gases from the burned fuel out of the

cylinder.

The piston is connected to an engine

part called the crankshaft, which is outside

of the cylinder. As the piston moves,

it turns the crankshaft. The crankshaft is

connected to other parts that run the

machine.

Other types of internal-combustion

engines are two-stroke, diesel, rotary,

and turbine. Two-stroke engines go

through two strokes instead of four. In

diesel engines hot air, not a spark, causes

the fuel to burn. Rotary engines have a

spinning part instead of a piston. Turbine

engines, used in jet airplanes, continually

pull air into the front of the

engine. The exhaust leaves out the back

of the engine.

Although internal-combustion engines

are powerful, most of the energy from

the burning fuel is lost as heat. The

engines must be cooled by water or air

so they do not overheat.

History

In 1860 the French inventor Etienne

Lenoir built the first internalcombustion

engine, which he used in a

car. In 1876 the German engineer

Nikolaus Otto built a four-stroke

engine. Otto’s invention was the first

successful internal-combustion engine.

Rudolf Diesel, another German engineer,

developed the diesel engine in

about 1890.

#More to explore

Airplane • Automobile • Combustion

Internet

The Internet is a network, or system,

that connects millions of computers

worldwide. It was one of the greatest

inventions of the 1900s. Today the

Internet helps many people communicate,

work, learn, and have fun.

Two-stroke

engines are

popular for

lawn mowers

and small

motorcycle

engines.

BRITANNICA STUDENT ENCYCLOPEDIA Internet 141

In the 1960s the U.S. government, businesses,

and colleges worked together to

make a system that would let computers

across the United States share information.

They created an early form of the

Internet called ARPANET in 1969. In

1971 electronic mail, or e-mail, was

invented as a way to send a message

from one computer to another.

By the mid-1970s many groups of computers

were connected in networks.

Machines called routers were invented to

connect the networks. This is how the

original ARPANET eventually grew into

the Internet.

In 1989 hypertext was invented. Hypertext

is a link between different parts of

an electronic document or between different

documents. Hypertext became the

basis of the WorldWideWeb, or “the

Web,” which was created in the early

1990s.

Information on theWeb is arranged in

sites or pages. People view Web sites

using computer programs called Internet

browsers. People createWeb sites using a

code called hypertext markup language,

or HTML. Browsers read HTML and

allow people to viewWeb sites on the

computer. EachWeb site has its own

Internet address, called a uniform

resource locator, or URL.

Since its beginnings, the Internet has

changed to keep up with the demands of

its users. Advances in technology make

using the Internet quicker and easier.

And as more and more people use the

Internet, the quantity of information

grows.

#More to explore

Computer • Technology and Invention

Intestines

Intestines are organs, or body parts, that

are shaped like long tubes. They help

break down food so that the body can

use it for energy. This is part of the process

called digestion. The intestines also

remove wastes from the body. Mammals,

birds, reptiles, amphibians, and

fish have intestines.

A human’s intestines fill much of the

middle part of the body below the rib

cage. The intestines are divided into two

main sections, the small intestine and

the large intestine. The small intestine is

22 to 25 feet (6.7 to 7.6 meters) long

and coils like a maze. The large intestine

is 5 to 6 feet (1.5 to 2 meters) long. The

intestines have a special kind of muscle

that squeezes and relaxes in a wavelike

A family uses a computer with a camera

attached to it. The camera can take pictures

that can be sent over the Internet to other

family and friends far away.

142 Intestines BRITANNICA STUDENT ENCYCLOPEDIA

motion. This motion pushes food and

waste through the intestines.

The Small Intestine

Food enters the small intestine after it

leaves the stomach. At this time the food

is in the form of a thick liquid. Digestive

juices from other organs, including the

pancreas and the liver, enter the small

intestine. They work with juices from

the small intestine to break down the

food into simple chemical substances.

These substances then pass into the

bloodstream through the walls of the

small intestine. This process takes three

to six hours.

The Large Intestine

Any food material that cannot be used

by the body passes from the small intestine

into the large intestine. The large

intestine takes water and some minerals

from this leftover food material. Tiny

living things called bacteria in the large

intestine help to turn the food material

into feces, or solid waste. The feces are

stored in the large intestine until they

pass from the body. The work of the

large intestine takes between 10 and 20

hours.

#More to explore

Digestive System • Stomach

Inuit

#see Eskimo.

Invention

#see Technology and Invention.

Invertebrate

An invertebrate is an animal without a

backbone. (An animal with a backbone

is called a vertebrate.) Invertebrates live

in every part of the world. In fact, most

of the animals on Earth are invertebrates.

Invertebrates come in all different shapes

and sizes. Some are so tiny that they can

be seen only through a microscope. But

the giant squid is an invertebrate, and it

can grow to a length of 65 feet (20

meters).

The simplest animals are invertebrates.

These include protozoans with just one

cell as well as sponges and other simple

animals that live in the water.

In humans, the small intestine is longer and

narrower than the large intestine.

BRITANNICA STUDENT ENCYCLOPEDIA Invertebrate 143

The invertebrate animals can be grouped

according to their features. Many of

them, such as worms, have soft bodies.

Corals, jellyfish, and sea anemones are

invertebrates that have stinging tentacles.

Mollusks have soft bodies as well,

but most also have a thick outside shell.

Oysters and snails are mollusks. Squid

and octopuses are also mollusks even

though they do not have shells.

Some invertebrates have a tough, spiny

skin that protects their bodies. These

invertebrates are called echinoderms.

Starfish and sea urchins are examples of

echinoderms.

Other invertebrates have a hard outside

covering on their bodies called an exoskeleton.

These invertebrates are called

arthropods. Arthropods include insects,

spiders, centipedes, millipedes, and crustaceans

such as lobsters and crabs.

#More to explore

Vertebrate

Iowa

The Native Americans known as the

Iowa (or Ioway) once lived near the

Great Lakes. By the 1700s, however,

they had moved to what is now the state

of Iowa. The state was named after the

tribe.

The Iowa lived in villages of domeshaped

houses covered with earth. They

grew corn, beans, and squash. They also

hunted bison (buffalo) and deer. After

getting horses in the 1700s the Iowa

covered greater distances while hunting

on the Great Plains. On the hunt they

lived in tepees covered with bison hides.

French traders began visiting Iowa villages

in about 1700. They carried a disease

called smallpox that killed many

Iowa. U.S. explorers led by Meriwether

Lewis andWilliam Clark passed through

Iowa territory in the early 1800s. Many

settlers followed.

In 1836 the U.S. government forced the

Iowa to move to a reservation in what

are now Kansas and Nebraska. Later in

the 1800s the United States tried to

move the Iowa to Indian Territory (now

Oklahoma). Not all the Iowa moved.

The tribe separated into two groups now

known as the Iowa Tribe of Oklahoma

and the Iowa Tribe of Kansas and

Nebraska. At the end of the 20th century

there were about 1,500 Iowa.

#More to explore

Native Americans

Shauhaunapotinia was a chief of

the Iowa people.

144 Iowa BRITANNICA STUDENT ENCYCLOPEDIA

Iowa

The U.S. state of Iowa is one of the

most productive agricultural areas in the

United States. It is sometimes called the

Tall Corn State because that crop grows

well there. Iowa’s official nickname,

however, is the Hawkeye State, in honor

of a Native American leader named

Black Hawk. The state was named for

the Iowa (or Ioway) Indians who once

lived in the area. The state capital is Des

Moines.

Geography

Iowa lies in the north-central part of the

United States. The state is located

between the Mississippi River in the east

and the Missouri River in the west.

Iowa is bordered by Minnesota on the

north,Wisconsin and Illinois on the

east, Missouri on the south, and

Nebraska and South Dakota on

the west. There are two chief breaks in

the state’s level sweep of land. Steep

cliffs drop to the Mississippi River in the

northeast. Low, moundlike bluffs rise

above the prairies in the southwest.

Summers are warm and humid. The

winters are cold.

People

Whites of European heritage make up

more than 90 percent of Iowa’s population.

Hispanics represent about 3 percent

of the population and African

Americans about 2 percent. Iowa is a

checkerboard pattern of farms, towns,

and cities. Most Iowans live in small

communities. The state’s largest cities

are Des Moines, Cedar Rapids, and

Davenport. The main public institutions

of higher learning are the University of

Iowa, at Iowa City; Iowa State University,

at Ames; and the University of

Northern Iowa, at Cedar Falls.

The skyline of downtown Des

Moines provides a modern backdrop

to the Iowa state Capitol.

BRITANNICA STUDENT ENCYCLOPEDIA Iowa 145

Economy

With rich soils, mostly flat ground, and

plenty of rainfall, Iowa is an almost perfect

place to grow crops. About 90 percent

of its land is used for agriculture.

The state specializes in corn, soybeans,

and livestock (especially hogs and

cattle). Dairy production is a major

industry in the northeast part of the

state.

Despite the importance of agriculture in

Iowa, the state’s leading sources of

income are manufacturing and services

such as real estate, insurance, and health

care. The most important manufacturing

industries are the production of

industrial machinery and the processing

of food.

History

The earliest settlers in what is now Iowa

were Native Americans. From about AD

300 to the 1600s eastern Iowa was

inhabited by Native Americans who

built great earth mounds, some in the

shape of animals.

The French explorers Louis Jolliet and

Jacques Marquette reached Iowa in

1673. They were probably the first

Europeans to set foot in the area. No

Europeans settled there permanently,

however, until the early 1830s.

Iowa was part of the area called the

Louisiana Purchase that the United

States bought from the French in 1803.

The territory of Iowa was formed in

1838. It entered the Union as the 29th

state in 1846.

The state was strongly against slavery

and fought on the side of the Union

during the American CivilWar (1861–

65). Shortly after the war Iowa became a

center of the Grange movement.

Granges were groups of farmers who

came together to find ways to solve

common problems.

Agriculture continues to be a central

feature of Iowa. In 1959 a leader of the

Soviet Union visited the state. In the

spirit of cooperation created by the visit,

Iowa began to export, or sell, some of its

grain to that country. Since then Iowa

has exported agricultural products to

many overseas countries.

In 1988 Iowa farmers had problems due

to heat and drought. The opposite took

place in 1993 as too much rain caused

the Mississippi River to flood many

farms and cities.

..More to explore

American CivilWar • Des Moines

• Iowa, people

An Iowa farmer checks young corn plants

for damage and disease. Corn is an important

crop in Iowa.

Facts About

IOWA

Flag

Population

(2000 census)

2,926,324—

rank, 30th state;

(2008 estimate)

3,002,555—

rank, 30th state

Capital

Des Moines

Area

56,272 sq mi

(145,743 sq

km)—rank, 26th

state

Statehood

December 28,

1846

Motto

Our Liberties We

Prize and Our

Rights We Will

Maintain

State bird

Eastern goldfinch

State flower

Wild rose

146 Iowa BRITANNICA STUDENT ENCYCLOPEDIA

Iran

Iran is a country of southwest Asia. For

much of its history Iran was known as

Persia to the outside world. However,

the people of the region have called their

country Iran for thousands of years. Iran

means “land of the Aryans.” The Aryan

people settled in the region in ancient

times. Iran’s capital is Tehran.

Geography

Iran is part of the region called the

Middle East. It shares borders with Iraq,

Turkey, Armenia, Azerbaijan, Turkmenistan,

Afghanistan, and Pakistan. Iran has

coastlines on the Caspian Sea, the Persian

Gulf, and the Gulf of Oman.

Iran’s land is high in elevation, except

for narrow regions along the coasts.

Mountain ranges surround a large

central area of rocky highlands and

deserts. Parts of the vast deserts are

sandy, while a crust of salt covers other

parts. The highest point in Iran is

Mount Damavand in the northern

Elburz Mountains. It reaches a height

of 18,606 feet (5,671 meters). Iran has

active volcanoes, and damaging

earthquakes often occur.

The temperatures in Iran vary from very

hot to very cold, depending on location

and season. Most of the country is dry,

except for a region around the Caspian

Sea.

Plants and Animals

Forests cover only a small part of Iran.

The largest forests are in the rainy

Caspian Sea region. Oaks and other

trees grow there and in the

southwestern Zagros Mountains. In the

dry interior the vegetation is shrubby

and grassy. However, a few areas of the

desert, called oases, get water from

underground. Grape vines, oleanders,

date palms, and mulberry trees grow in

the oases.

Iran’s wildlife includes bears, wild boars,

gazelles, wild asses, rabbits, and many

kinds of rodents. Seagulls, ducks, and

geese are common birds.

People

Many ethnic groups live in Iran. Persians

make up the largest group. Azerbaijanis,

Kurds, Lurs, and other peoples form

smaller groups. The main language is

Farsi, or Persian. Each of the ethnic

groups has its own language as well.

Most Iranians live in cities or towns.

BRITANNICA STUDENT ENCYCLOPEDIA Iran 147

About 90 percent of the people belong

to the Shi!ah branch of Islam, which is

the state religion. (In most Muslim

countries, Sunnah is the more common

branch of Islam.) A small percentage of

Iranians practice Zoroastrianism, the

religion of ancient Persia.

Economy

Iran is one of the world’s leading producers

of petroleum (oil). Iran also produces

natural gas, chemicals, metals,

food products, cloth, and machinery.

Iran has been famous for its carpets for

hundreds of years. Traditional carpets

are still an important export. Services—

including government work, banking,

and tourism—are also important to the

economy.

Iran’s crops include grains, sugar beets,

and many kinds of fruits and nuts.

Sheep are the main livestock. Commercial

fisheries operate in the Persian Gulf

and in the Caspian Sea.

History

The Aryan people came from central

Asia to what is now Iran sometime after

2000 BC. The two main groups of Aryans

were the Medes and the Persians.

The Persians took control in about 550

BC. They conquered vast territories. The

Persian Empire soon stretched from

North Africa to the Indus River in south

Asia. The European conqueror Alexander

the Great held Persia for a time

starting in about 330 BC.

about 550 BC AD 640 1502 1925 1979 1980 1989

The Persians

begin building

a great empire.

Arabs bring

Islam to Iran.

The Safavid

dynasty takes

power.

Reza Khan

becomes shah

of Iran.

Iran becomes

an Islamic

republic.

The Iran-Iraq

War begins.

Ali Khamenei

becomes Iran’s

new religious

leader.

T I M E L I N E

A mosque with its welcoming courtyard

stands in the city of Esfahan in western Iran.

148 Iran BRITANNICA STUDENT ENCYCLOPEDIA

Muslim Rule

Arab conquerors brought Islam to Iran

in 640. For about 850 years non-Iranian

Muslims ruled Iran. Then, in 1502, the

Iranian Safavid dynasty took control.

A weaker dynasty, the Qajars, ruled from

1779 to the early 1900s. During the

Qajars’ rule Russia and Great Britain

won control over parts of Iran.

The Pahlavi Dynasty

In 1921 Reza Khan, an army officer,

seized control of the country. In 1925 he

became shah, or king, and took the

name Reza Shah Pahlavi. His reign

started the Pahlavi dynasty. Reza Shah

built modern schools and a railroad. He

also gave Iranian women more rights.

Reza Shah’s son, Mohammad Reza Shah

Pahlavi, took the throne in 1941. The

new shah continued to make Iran more

modern. However, he also used secret

police to stop those who disagreed with

him.

Many religious leaders felt that the

shah’s ideas went against Islam. The

government threw one of those leaders,

Ayatollah Ruhollah Khomeini, out of

the country in 1964.

From outside Iran, Khomeini led a revolution

against the shah. Huge protests

forced the shah to leave Iran in 1979.

The Islamic Republic

Khomeini then returned to Iran. He

declared himself Iran’s political and religious

leader for life. He renamed the

country the Islamic Republic of Iran.

Khomeini’s government enforced strict

Muslim laws. It also bannedWestern

(U.S. and European) influences.

In late 1979 supporters of the revolution

seized the U.S. embassy (a building that

belonged to the U.S. government) in

Tehran. They captured 66 U.S. citizens

and held them for more than a year.

In 1980 Iraq invaded Iran, and the Iran-

IraqWar began. The war ended in 1988.

More than a million people were killed

or injured during the war. However,

neither side won a clear victory.

Khomeini died in 1989. Iran then chose

a new religious leader, Ali Khamenei.

Khamenei continued the government’s

strict policies. He worked with the

country’s presidents. However, Khamenei

and other religious leaders still controlled

much of the government.

..More to explore

Iran-IraqWar • Islam • Middle East

• Persia • Tehran

A woman weaves a carpet on a large loom

in Iran. Traditional carpets from Iran are

known for their fine quality and design.

Facts About

IRAN

Population

(2008 estimate)

72,269,000

Area

636,374 sq mi

(1,648,200 sq

km)

Capital

Tehran

Form of

government

Islamic republic

Major cities

Tehran, Mashhad,

Esfahan,

Tabriz, Shiraz

BRITANNICA STUDENT ENCYCLOPEDIA Iran 149

Iran-IraqWar

Differences between the neighboring

countries of Iran and Iraq led to war in

1980. The fighting lasted for eight years.

The Iran-IraqWar brought terrible

destruction to both countries but ended

with no clear winner.

Background

In 1979 there was a revolution in Iran.

A strict religious leader named Ayatollah

Ruhollah Khomeini came to power.

Saddam Hussein, the leader of Iraq, did

not want the revolution to spread to his

country. He was also angry at Iran for

supporting the Kurds, a minority group,

in a rebellion against Iraq.

Iran and Iraq had disagreed for years

over an oil-producing area on their border.

Saddam Hussein wanted to take

control of the region, which is in southwestern

Iran. He used this land dispute

as an excuse to start a war.

Events of theWar

Iraq invaded Iran by surprise in September

1980. Iraq won a few early victories.

However, Iran did not give up as Saddam

Hussein had expected. By mid-

1982 Iran had won back almost all the

land that Iraq had taken. Then Iranian

forces pushed into Iraq.

For the next five years the two sides were

evenly matched. Both suffered heavy

losses. Iran and Iraq bombed each other’s

cities, oil fields, and tanker ships,

which were used for shipping oil. Iraq

got help from many countries, including

the Soviet Union, Great Britain, and the

United States.

Neither country obeyed the usual rules

of war. Iraq used many chemical weapons.

That had not been done by any

country sinceWorldWar I (1914–18).

Iran cleared minefields by forcing young

village boys to walk through them.

In 1987 Iraq started winning the war. In

1988 Iran accepted an agreement to end

the fighting. At least 1 million people

were killed or injured.

Peace talks continued until 1990. The

countries agreed to share control of a

river on their border. Iraqi troops left

Iran in 1991. The last prisoners of war

were exchanged in 2003.

#More to explore

Iran • Iraq

An Iraqi soldier crouches behind cover during

the Iran-Iraq War.

150 Iran-Iraq War BRITANNICA STUDENT ENCYCLOPEDIA

Iraq

The country of Iraq covers the ancient

region of Mesopotamia, a Greek word

meaning “land between the rivers.”

Those ancient rivers, the Tigris and the

Euphrates, still run through Iraq. Today

Iraq is one of the world’s leading oil

producers. Baghdad is the capital and

largest city.

Geography

Iraq is located in Southwest Asia in the

region known as the Middle East. It

borders Turkey, Iran, Kuwait, Saudi Arabia,

Jordan, and Syria. Iraq has a short

coastline on the Persian Gulf.

The central and southeastern parts of

the country are plains with many lakes.

Marshy lowlands surround the area

where the Tigris and Euphrates rivers

meet, near the Persian Gulf. North of

the plains, between the rivers, is a dry

area known as Al-Jazirah.Western and

southern Iraq is a vast desert. Highlands

in the northeast include the mountainous

region known as Kurdistan.

The plains and deserts have very hot

summers and mild winters. Those

regions receive little rainfall. The northeast

is cooler and wetter, especially in the

mountains.

Plants and Animals

Iraq has many date trees but very few

forests.Willows, poplars, and licorice

plants grow along the Tigris and Euphrates

rivers. Reeds and tall grasses cover

the marshlands. There are few plants in

the deserts or on the dry plains.

The wild animals of Iraq include hyenas,

pigs, jackals, foxes, and rabbits. Among

the many varieties of birds are ducks,

The minaret, or tower, of a

mosque in Samarra, Iraq, spirals

to a height of about 170 feet (52

meters).

BRITANNICA STUDENT ENCYCLOPEDIA Iraq 151

partridges, snipes, and herons. People

raise water buffalo in the marshlands.

People

Arabs make up the majority of Iraq’s

population. They speak Arabic, which is

the country’s main language. The Kurds

form the next-largest group. They speak

Kurdish and live mainly in the north

and northeast. Almost all Iraqis are

Muslims.

Most Iraqis live in cities and towns,

where they lead modern lifestyles. Many

rural Iraqis farm the land or raise livestock.

Economy

Wars in the late 20th and early 21st centuries

badly hurt Iraq’s economy. However,

oil still provides almost all of Iraq’s

earnings from trade. Iraq also produces

oil products, chemicals, construction

materials, and processed foods. It

imports food, medicine, and other

goods.

Farming is another important part of the

economy. Crops include wheat, dates,

potatoes, tomatoes, barley, watermelons,

oranges, grapes, and cucumbers. Iraqis

also raise sheep and cattle.

History

Iraq’s history reaches back thousands of

years. In about 3300 BC the Sumerians

created one of the world’s first civilizations

in Mesopotamia. People from

Babylonia, Assyria, Persia, Macedonia,

and other nearby areas later ruled the

region.

Arab and Ottoman Rule

Muslims from Arabia conquered the

area in the AD 600s. For a time Baghdad

was the center of the Muslim world.

Many of the greatest Muslim philosophers,

poets, and writers lived there. In

1258 a group called the Mongols conquered

the city. Iraq then became a land

of small kingdoms. The Ottoman Turks

took control in the 1500s. Iraq remained

638 1534 1918 1932 1980 1991 2003

Muslim Arabs

conquer Iraq.

The Ottoman

Empire takes

control of

Baghdad.

Great Britain

occupies Iraq.

Iraq gains

independence.

Iraq invades

Iran.

Foreign troops

defeat Iraq in

the Persian

Gulf War.

U.S.-led forces

invade Iraq.

T I M E L I N E

152 Iraq BRITANNICA STUDENT ENCYCLOPEDIA

part of the Ottoman Empire until the

20th century.

The Republic of Iraq

DuringWorldWar I (1914–18) British

troops occupied Baghdad and ended

Ottoman rule. After the war Iraq

remained under British protection. In

1921 Iraq became a monarchy. The

country achieved full independence in

1932. A revolution led by a group of

army officers ended the monarchy in

1958. Iraq then became a republic.

In the 1960s and 1970s the Iraqi government

faced a rebellion by the Kurds.

The rebels wanted self-government. Iran

provided military aid to the Kurds,

which strained relations between Iraq

and Iran. The Kurdish rebellion collapsed

in 1975, but occasional fighting

continued into the 21st century.

The Iran-Iraq and

Persian GulfWars

Saddam Hussein became Iraq’s

president in 1979. A year later Iraq

invaded Iran. The resulting Iran-Iraq

war lasted until 1988. Neither side won

a clear victory.

In 1990 Saddam ordered Iraqi troops to

invade the neighboring country of

Kuwait. Iraq claimed that Kuwait had

been part of its territory since 1871. The

invasion led to the Persian GulfWar of

early 1991. In less than two months, a

group of nations led by the United

States pushed Iraq’s forces out of

Kuwait.

Ongoing Troubles

At the end of the Persian GulfWar,

weapons inspectors from the United

Nations entered Iraq. The inspectors

wanted to make sure that Iraq destroyed

some of its weapons and stopped making

more. Iraq refused to cooperate with

the inspectors.

The United States and Great Britain

feared that Iraq was building illegal

weapons. As a result, U.S. and British

forces invaded the country in March

2003. The foreign troops soon took

control of Iraq and captured Saddam.

The foreign forces and Iraqi leaders then

worked to set up a new government in

Iraq. However, some Iraqis continued to

fight the foreign troops and the new

Iraqi leaders. Violence also broke out

between followers of the Sunnah and

Shi!ah branches of Islam.

..More to explore

Baghdad • Mesopotamia • Persian Gulf

War • Saddam Hussein

A rocket blasted a hole in an archway leading

to the National Museum of Iraq in

Baghdad during a war in 2003. The city

suffered heavy damage during the war.

Facts About

IRAQ

Population

(2008 estimate)

29,492,000

Area

167,618 sq mi

(434,128 sq km)

Capital

Baghdad

Form of

government

Transitional

government

Major cities

Baghdad, Mosul,

Al-Basrah, Irbil,

Kirkuk

BRITANNICA STUDENT ENCYCLOPEDIA Iraq 153

Ireland

Known as the Emerald Isle, Ireland is

famous for its green countryside.

Throughout much of its history, Ireland

fought against rule by Great Britain.

Most of the island gained independence

in the 1920s. However, Britain continued

to control a section called Northern

Ireland. In the 1990s the independent

republic of Ireland became a successful

member of the European Union. The

capital is Dublin.

Geography

The Republic of Ireland occupies most

of the island of Ireland. Its neighbor,

Northern Ireland, occupies one sixth of

the island. The island lies off the western

coast of Great Britain, from which it is

separated by the Irish Sea. The Atlantic

Ocean borders western Ireland.

A low-lying plain spans most of eastern

and central Ireland. Hills and low

mountains rise mainly in the west.

Carrantuohill, at 3,414 feet (1,041

meters), is the highest point in the

country. The most famous of Ireland’s

rivers is the Shannon. The country has

mild summers and cool winters with

plenty of rain.

Plants and Animals

Grasslands, heather, and pastures cover

most of the country. Mosses and lichens

grow throughout the island. Ireland has

few trees. Most of the original forests

were cut down long ago for lumber and

to clear the land for farming.

Ireland has a wide variety of birds and

fish. Mammals include mice, hares, and

stoats (animals similar to weasels). The

only reptile in Ireland is a type of lizard.

There are no snakes. According to legend,

Saint Patrick chased all the snakes

from the island, but it is unlikely that

Ireland ever had any.

People

Most people in Ireland are ethnic Irish,

whose main ancestors were the ancient

Celts. English people form a small

group. Students learn both Irish (also

called Gaelic) and English in school, but

the everyday language is English. Most

Irish are Roman Catholics. About 40

percent of the people live in rural areas.

Beginning in the mid-1800s, large numbers

of people left Ireland because of

crop failures, a poor economy, and high

unemployment. Today more Irish

154 Ireland BRITANNICA STUDENT ENCYCLOPEDIA

people live outside Ireland than inside

the country.

Economy

Ireland’s people relied on farming for

their income for much of the 1900s.

During the 1990s, however, the country

enjoyed great economic growth. This

was due in part to the development of a

technology industry. Services, including

finance, transportation, and public

administration, are now Ireland’s main

economic activities. Tourism is one of

the country’s largest service industries.

Manufacturing, mining, and construction

are also very important to the

economy. Among Ireland’s products are

office equipment and computers, chemicals,

medicines, alcoholic beverages, and

clothing. Ireland has limited natural

resources, including zinc, lead, and silver,

as well as small reserves of natural

gas and coal.

Agriculture is now a small part of the

Irish economy. Crops include sugar

beets, barley, wheat, and potatoes. Farmers

raise cattle for meat and milk, sheep

for wool, and pigs for meat. Fishing is

another source of food.

History

The first people to live in Ireland were

hunters and fishers. They came from the

European mainland in about 6000 BC.

Later settlers brought knowledge of

farming in about 3000 BC and skills in

metalworking by about 2000 BC.

In about 300 BC invaders from Europe

known as Celts overran Ireland. The

Celts wiped out almost all the earlier

inhabitants. They set up a number of

kingdoms on the island.

In the AD 400s Saint Patrick helped to

spread Christianity among the population

of Ireland. Ireland remained peaceful

until the late 700s, when Vikings

invaded. The Irish finally defeated the

Vikings in 1014.

English Rule

In 1170–71 English armies conquered

large parts of Ireland. In the early 1600s

The Newgrange tomb in Ireland was built in

about 3200 BC. Ancient peoples buried

their dead inside the tomb.

Colorful houses line the street in the village

of Eyeries in southern Ireland.

BRITANNICA STUDENT ENCYCLOPEDIA Ireland 155

England sent English and Scottish Protestants

to settle in northern Ireland.

Irish Catholics revolted against those

settlers in 1641, but the English crushed

the revolts. They also imposed strict

anti-Catholic laws.

By the end of the 1600s England firmly

controlled the island. In 1801 the Act of

Union joined Great Britain (England,

Scotland, andWales) and Ireland

together to form the United Kingdom.

Independence

The Irish strongly opposed British rule.

Beginning in 1919 a group called the

Irish Republican Army (IRA) fought the

British Army for independence. In 1921

Britain agreed to make the southern part

of the island the Irish Free State. Six

counties in the north remained under

direct British control, however. Those

countries were renamed Northern Ireland.

In 1937 the Irish Free State took

the name Eire, or Ireland. Ireland

adopted a new constitution, though it

kept some ties to Britain.

In 1949 Ireland became a fully

independent republic. Britain and

Ireland struggled over control of

Northern Ireland until 1973. That year

the government of Ireland

acknowledged British rule in the north.

But the IRA, now separate from the

Irish government, continued to attack

the British in the hope of reuniting

Ireland. The Irish government helped

work out a peace agreement between

the two sides in 1998.

In 1993 Ireland became one of the original

members of the European Union. At

the start of the 21st century, Ireland

welcomed growing numbers of immigrants

for the first time in its modern

history.

..More to explore

Celt • Dublin • European Union

• Northern Ireland • United Kingdom

before

300 BC AD 795 1170 1641 1845 1921 1948

The Celts settle

in Ireland.

The Vikings

invade Ireland.

England begins

conquering

Ireland.

An Irish revolt

against English

rule fails.

The Irish potato

famine begins.

Southern

Ireland

becomes the

Irish Free State.

The Irish Free

State votes to

become an

independent

republic.

T I M E L I N E

Facts About

IRELAND

Population

(2008 estimate)

4,467,000

Area

27,133 sq mi

(70,273 sq km)

Capital

Dublin

Form of

government

Republic

Major cities

Dublin, Cork,

Galway, Limerick,

Waterford

156 Ireland BRITANNICA STUDENT ENCYCLOPEDIA

Ireland,

Northern

#see Northern Ireland.

Iris

Irises are popular garden flowers. They

are known for their wide variety of colors

and their unique petal shapes. There

are about 300 species, or types, of iris.

They grow mostly in mild northern

regions. Some of the most beautiful species

are from central Asia and the area

around the Mediterranean Sea.

Some irises grow from bulbs. Others

grow from the rhizomes of other iris

plants. Rhizomes are vinelike stems that

spread out just beneath the surface of

the soil. New plants grow from different

points on a rhizome.

Irises have six petals. The three inner

petals stand upright and are called standards.

The three outer petals droop

down and are called falls. The petals can

be white, yellow, pink, red, blue, purple,

brown, or even black.

The best-known irises are the common

garden irises. They are also called

bearded irises. This is because each of

the falls has a fuzzy growth that looks

something like a beard. Bearded irises

grow from rhizomes. They have stiff,

swordlike leaves and long stems. They

can grow to 3 feet (90 centimeters) tall.

They usually have a strong fragrance.

#More to explore

Flower • Garden

Iron

Iron is the most widely used metal on

Earth. Iron is used to make steel. In

turn, steel is used to make buildings,

bridges, railroad tracks, vehicles of all

kinds, and countless other products.

The Siberian iris grows in central

and eastern Europe. Its flowers

may be violet-blue or white.

People make some decorative railings out of

iron.

BRITANNICA STUDENT ENCYCLOPEDIA Iron 157

Iron in Earth’s Crust

Iron is the second most common metal

in Earth’s crust. Of the metals in the

crust, only aluminum is more common.

Iron is also the fourth most common

element (basic substance) in the crust.

Iron in its pure form is a heavy, silvery,

magnetic metal. But iron is almost never

found in its pure form in nature.

Instead, it is found in the form of iron

ores. Ores are minerals with mixtures of

different elements. The main iron ores

are made up of iron linked to oxygen or

to oxygen and carbon.

Separating and Using Iron

Workers separate pure iron from iron

ore by a process called smelting. Smelting

involves heating iron ore to a very

high temperature. As the iron ore melts,

the pure iron separates from the ore.

Hot lumps of iron may be pounded into

shapes. Melted iron may be poured into

molds of different shapes. As the iron

cools, it hardens. Today, however, most

iron is made into steel. Steel is a mixture

of iron and carbon. Steel is stronger than

iron alone.

Thousands of years ago people may have

gotten iron from iron meteorites. Meteorites

are chunks of rock that fall to

Earth from outer space. After ancient

peoples discovered how to smelt iron,

they learned how to make iron tools and

weapons. During a period called the

Iron Age, the knowledge of how to use

iron spread across Europe and Asia.

Iron in the Body

Iron is an important part of a person’s

diet. Good sources of iron are red meat,

chicken, tuna, egg yolks, beans, whole

grains, dried fruit, and leafy green vegetables.

The body uses iron to build a

substance called hemoglobin in the

blood. Hemoglobin carries oxygen to all

the cells in the body. The cells use the

oxygen to release the energy they need

to do their jobs.

#More to explore

Iron Age • Metal • Steel

Iron Age

The Iron Age was a time in early human

history when people began to use tools

and weapons made of iron. The Iron

Age started and ended at different times

in different places. The earliest Iron Age

probably took place in the Middle East

Iron pounded

into a shape is

called wrought

iron. Iron

poured into a

mold is called

cast iron.

People in eastern Europe made iron tools

more than 2,400 years ago.

158 Iron Age BRITANNICA STUDENT ENCYCLOPEDIA

and southeastern Europe. It started there

in about 1200 BC.

Background

The earliest human beings lived during

the Stone Age. Stone Age peoples made

tools and weapons of stone. Later they

learned to make tools and weapons from

copper and from bronze, which is a mixture

of copper and tin. This time was

known as the Bronze Age. The Iron Age

started after people learned to remove

iron from rock using a very hot fire. Iron

was better than bronze for tools and

weapons because it was harder and

stronger.

Events of the Iron Age

The knowledge of how to get iron from

rock and how to make iron tools spread

quickly from the Middle East to Egypt

and Greece. The Iron Age eventually

spread as far asWest Africa, northern

Europe, India, and East Asia. Australia

and the Americas did not have an Iron

Age. European settlers brought ironworking

to those places much later.

The use of iron brought important

changes to people’s lives. People used

iron to make strong tools, which made

farming easier. They also made iron

swords and other weapons. Huge armies

of soldiers soon carried iron weapons.

These weapons made an army much

harder to defeat. Armies traveled to

other lands and took over places they

liked. Kings and other rulers gained

great power.

Other changes in technology also happened

during the Iron Age. People built

large forts and bridges. Pottery and

weaving improved. Humans dug deep

mines in the ground to find salt and

other valuable minerals.

End of the Iron Age

The Iron Age came at the end of prehistory,

or the time before humans used

writing. (In some places people were

already using early forms of writing

when the Iron Age began.) The Iron Age

ended as writing became widespread and

as civilization grew more complex.

Still, iron was the most important metal

until the 1800s. People had often mixed

iron with other materials to make it

stronger, but in the 1800s they learned

easier ways to do this. As a result steel (a

mixture of iron and carbon) became

more widely used than iron alone.

#More to explore

Bronze Age • Iron • Prehistoric Life

• Stone Age

A museum in Great Britain shows the type

of house that people built in about 300 BC,

during the British Iron Age. The house is

made of wood, plant materials, and mud.

BRITANNICA STUDENT ENCYCLOPEDIA Iron Age 159

Iroquois

The Iroquois Confederacy was a powerful

alliance, or group, of Native American

tribes in the 1600s and 1700s. The

five original Iroquois tribes were the

Cayuga, the Mohawk, the Oneida, the

Onondaga, and the Seneca. The Tuscarora

joined later. The Iroquois lived

mainly in what is now the U.S. state of

New York. Many Iroquois still live in

New York. Others live inWisconsin or

southern Canada.

The Iroquois traditionally lived in buildings

called longhouses. They built longhouses

by covering a wooden frame with

tree bark. Each longhouse was large

enough for several families. For food,

the Iroquois planted fields of corn,

beans, and squash. They also fished and

hunted deer.

According to tradition, the Iroquois

Confederacy was founded by a chief

named Hiawatha in the late 1500s.

French explorers arrived in Iroquois territory

in the 1600s. The Iroquois fought

the French and their Indian allies. They

became allies and trading partners of the

British, who were enemies of the French.

With guns that they got in trade, the

Iroquois drove enemy tribes out of their

land.

The American Revolution (1775–83)

split the confederacy. The Mohawk, the

Seneca, the Onondaga, and the Cayuga

remained loyal to the British. They were

led by the Mohawk chief Joseph Brant.

The Oneida and the Tuscarora helped

the Americans.

After the war the Iroquois lost much of

their New York land. The British gave

Brant some land in Ontario, and many

Iroquois moved there. At the end of the

20th century there were about 80,000

Iroquois.

#More to explore

Cayuga • Hiawatha • Mohawk • Oneida

• Onondaga • Seneca • Tuscarora

Irrigation

Irrigation is what farmers do when they

add water to their fields. The water

makes their crops grow. Irrigation takes

the place of rainfall in dry regions. It can

greatly increase farm production. However,

irrigation can also cause problems

with the environment.

GettingWater

Most water for irrigation comes from

the ground or from a river. Farmers get

water from the ground by digging a

well. Then they lift or pump the water

from the well.

The Iroquois made houses out of tree bark

and carved canoes out of logs.

160 Iroquois BRITANNICA STUDENT ENCYCLOPEDIA

Farmers may get water from a river by

digging a channel, or path, from the

riverbank. They also may collect river

water by building a dam across the river.

Water collects behind the dam in an

artificial lake called a reservoir.

After getting water, farmers move it to

the farm fields. They move it through

canals or pipelines. Gravity moves the

water if the fields lie lower than the

water source. If the water source lies

lower than the fields, then farmers use

pumps to raise the water.

ApplyingWater

The next step in irrigation is to deliver

the water to the plants in the fields.

There are many ways to do this. They

include surface, subsurface, and overhead

irrigation.

Surface irrigation systems apply water

directly onto the soil surface. One kind

of surface irrigation is called flood irrigation.

This method floods the growing

plants with water. Rice is the main crop

irrigated by flood irrigation.

A second kind of surface irrigation is

called furrow irrigation. A furrow is a

shallow ditch between two rows of

growing plants.Water flows into the

furrows and then soaks into the earth.

Potatoes, sugar beets, cotton, and corn

are often irrigated by furrow irrigation.

A third kind of surface irrigation is

called drip, or trickle, irrigation. Pipes

with holes in them drip water onto

plants. This method is good for dry

regions. Because the plants get so little

water at one time they can use it right

away. This way, no water is wasted.

Subsurface irrigation systems apply

water beneath the soil’s surface. Buried

pipes with holes in them deliver water to

the plants. This method is good for fruit

plants and garden vegetables.

Overhead irrigation systems spray or

sprinkle water over crops. Rotary sprinklers

are a common form of overhead

irrigation. They sprinkle water in a wide

circle while moving slowly across a field.

Irrigation allows farmers to grow crops in

dry areas such as the desert of Saudi Arabia.

Water flows through furrows in a field in

Idaho.

BRITANNICA STUDENT ENCYCLOPEDIA Irrigation 161

Not all irrigation water gets to the

plants. Some evaporates into the air,

sinks deep into the ground, or runs off

along the ground. An irrigation system

usually includes a drainage system—

ditches or underground pipes—to

remove excess water from the soil.

Environmental Issues

Irrigation can cause environmental

problems. Irrigation water contains

more salt than rainwater. Salt can build

up in the soil and harm plants. Salt

buildup has ruined farmland in India,

Pakistan, and other countries.

Taking too much water to use for

irrigation can cause water shortages in

other places. Irrigation now takes more

water than nature can replace from the

ground in some areas. In central Asia,

the rivers that flow into the Aral Sea are

heavily used for irrigation. The sea

(actually a salt lake) is getting smaller as

a result.

History

Ancient farmers irrigated crops by channeling

river water. The Egyptians first

used Nile River water about 7,000 years

ago. The people in Mesopotamia (what

is now Iraq) used the Tigris and Euphrates

rivers. The people of the ancient

Indus Valley civilization used the Indus

River. The ancient Chinese used the

Huang He, or Yellow River.

Native Americans were using irrigation

more than 2,000 years ago. The Inca of

Peru developed an advanced farming

civilization based on irrigation. In about

AD 1200 the Hohokam Indians built

irrigation systems in what is now the

U.S. state of Arizona.

Since then more and more land has

come under irrigation. In the 1900s the

U.S. government built many large dams

for irrigation purposes. In the early 21st

century India, China, the United States,

and Pakistan had more irrigated land

than any other countries.

#More to explore

Agriculture •Water

Isabella

#see Ferdinand and Isabella.

Isis and Osiris

Isis and Osiris were among the most

important gods in ancient Egyptian

mythology. Osiris was the god of the

dead. He was also the god of crops and

plentiful growth. Isis was his wife and

An overhead sprinkler system waters the

crops on a farm in France.

162 Isabella BRITANNICA STUDENT ENCYCLOPEDIA

sister. She was a mother goddess believed

to have great magical powers. Isis and

Osiris had a son named Horus. The

Egyptians considered Isis and Horus to

be the perfect mother and child.

According to legend, Osiris and Isis had

a brother named Seth (or Set). Seth was

a god of violence and disorder. He

tricked Osiris into climbing into a

wooden box. When Osiris climbed in,

Seth slammed the lid shut. He threw the

box into the Nile River, sending Osiris

to his death.

Stories tell that Isis mourned her husband’s

death deeply. She recovered

Osiris’ body and buried him. Isis then

used her great magic to give new life to

Osiris. From then on, he was considered

the ruler of the land of the dead, or

underworld. Osiris was said to grant

people life after death in the underworld.

#More to explore

Egypt, Ancient • Mythology

Islam

Islam is one of the world’s major religions.

Its founder was Muhammad.

Islam has about 1.3 billion followers

worldwide. Most of the followers of

Islam, called Muslims, live in North

Africa, the Middle East, and southern

and central Asia.

Beliefs

At the core of Islam is this idea: “There

is no God but Allah, and Muhammad

is the prophet of Allah.” Muslims

believe that Allah created the universe

and that humans must submit to his

will. The content of the Koran, the

Muslims

consider

Adam, Noah,

Abraham,

Moses, and

Jesus to be

prophets.

The ancient Egyptians worshipped many

gods. Isis (right) and Osiris were two of the

most important gods.

BRITANNICA STUDENT ENCYCLOPEDIA Islam 163

holy book of Islam, is believed by

Muslims to be the word of Allah as told

to Muhammad.

Practices

Five duties, called the five pillars of

Islam, are expected of every Muslim.

The first is the most important: to profess

that there is one God and that

Muhammad was his prophet. The second

duty is prayer. Muslims pray five

times a day. On Fridays communities

gather at a place of worship, called a

mosque, for special prayers. The third

duty is charity. The fourth duty is to

fast, or refuse to eat, from sunrise to

sunset during the holy month of

Ramadan. The fifth duty is to make a

pilgrimage, or journey, to the holy city

of Mecca in Saudi Arabia at least once.

Divisions

There are two major branches of Islam.

Most Muslims belong to the Sunnah

branch. They are called Sunnites. Sunnites

are known as traditional Muslims.

They follow the sayings of Muhammad

and emphasize community.

Members of the smaller Shi!ah branch

are called Shi!ites. They believe that the

truths of the Koran are revealed only

through a community leader called the

imam. Interpretations by other people

are not accepted. For this reason Shi!ites

are not as open to other views as Sunnites

are.

History

Muhammad

According to Muslims, in 610 an angel

told Muhammad that Allah had chosen

him as a prophet. Throughout his life,

Muhammad continued to receive messages

that he believed came from God.

The idea that there is only one God was

unusual for Arabs at the time. Many

people in Muhammad’s hometown of

Muslims pray at a mosque in India.

Some Important Islamic Holidays

Holiday Meaning Date

Ramadan a month of fasting, or not eating, during ninth month of the Islamic calendar

daylight hours

!Id al-Fitr celebration of the end of Ramadan first three days of the 10th month

of the Islamic calendar

!Id al-Adha end of the time of the hajj, or the journey begins on the 10th day of the

to Mecca last month of the Islamic calendar

and lasts for four days

Note: The Islamic calendar is based on the Moon, so the holidays may occur in different seasons.

164 Islam BRITANNICA STUDENT ENCYCLOPEDIA

Mecca disliked the new religion because

of that belief. To avoid their hostility,

Muhammad encouraged his followers to

move to the nearby city of Medina.

Muhammad’s journey to Medina ended

on September 24, 622, which is considered

the starting point of Islamic history.

Division and Spread of Islam

Muhammad eventually persuaded most

of the people of Arabia (including

Mecca) to practice Islam. But after his

death in 632, Muslims disagreed as to

who should lead them. Muhammad’s

son-in-law !Ali became the Muslim

leader, or caliph, in 656. But he was

murdered in 661. Some Muslims maintained

that Muslim leadership belonged

to !Ali’s descendants alone. They formed

the Shi!ah branch of Islam. The Muslims

who disputed this claim became the

Sunnites.

During the 600s and 700s, Islam spread

far beyond Arabia, from the western

Mediterranean region to central Asia.

Holy wars called jihads were fought to

gain political control over societies so

that they could be run using Islamic

principles.

In the 11th century the Turks began

their rise as an Islamic power. The Seljuk

Turks conquered vast territories in the

Middle East. In 1071 they captured

Jerusalem. The Seljuks refused to allow

Christians to visit holy sites in the land

they controlled. Over the next two centuries,

Muslim powers fought off Christian

attempts to win back the Holy

Land in a series of wars known as the

Crusades. In the 1200s another group of

Muslim Turks, the Ottomans, began an

empire. The Ottomans eventually ruled

over North Africa, the Middle East, and

southeastern Europe for hundreds of

years.

Islam in Modern Times

During the 1800s and 1900sWestern

powers established colonies in Muslim

nations for the purpose of trade. Islamic

leaders lost political power. However,

Muslims drew together more as a community

in the face of colonization. In

the 1900s this sense of unity helped

many Muslim countries in their

struggles for political independence.

In the late 1900s Islam became one of the

fastest-growing world religions. Some

Muslims have resisted the influence of

theWest, which they view as leading to a

loss of traditionalMuslim values. In Iran

a revolution brought Islamic religious

Many Muslim women and girls wear head

scarves.

BRITANNICA STUDENT ENCYCLOPEDIA Islam 165

leaders to power in 1979. Islam has had a

strong influence on the governments of

other countries as well.

#More to explore

Arabs • Caliphate • Crusades

• Jerusalem • Koran • Mecca • Middle

East • Mosque • Muhammad

• Ottoman Empire • Pilgrimage

• Ramadan

Islamabad

Population

(1998 estimate)

529,180

Islamabad is the capital of Pakistan, a

country in southern Asia. Meadows, low

mountains, and hilly plains surround

the city. Its name means “City of Islam”

or “City of Peace.”

Islamabad is a carefully planned city. It

was built during the 1960s to be the

new capital of Pakistan. Some of the

buildings in Islamabad were designed

using traditional Islamic styles. The city

has wide, straight streets and many gardens

and parks. The University of

Islamabad and the Open University are

located in Islamabad.

The city of Karachi was Pakistan’s first

capital. Islamabad became the capital in

1969. Pakistan and India fought a war

in 1971. The war slowed the city’s

development for a time.

#More to explore

Pakistan

Island

An island is an area of land that is surrounded

by water. Islands can be found

in all bodies of water, from streams and

rivers to lakes, seas, and oceans. The two

main types of islands are oceanic islands

and continental islands.

The Grand National Mosque in Islamabad

stands in front of the Margalla Hills, which

are part of the Himalayas.

An oceanic island in the South Pacific rises

from the ocean floor.

166 Islamabad BRITANNICA STUDENT ENCYCLOPEDIA

Oceanic Islands

Oceanic islands are the tops of underwater

volcanoes. An oceanic island forms

when a volcano erupts deep under the

ocean and pushes the ocean floor

upward into a mountain. The island is

the top of that mountain. The Hawaiian

Islands are examples of oceanic islands.

Atolls are another type of island in the

ocean. An atoll is a ring of land around a

shallow body of water called a lagoon.

Atolls form when corals build a colony,

or reef, around the top of an underwater

volcano. Eventually the reef reaches the

surface of the water and becomes land.

Atolls make up the country of the Marshall

Islands.

Continental Islands

Continental islands are close to the continents.

They are parts of the same land

that makes up the continents. One way

that continental islands form is by the

flooding of valleys close to the coast.

The valleys fill with seawater, and the

tops of nearby hills then become islands.

Long Island, which lies off the coast of

the U.S. state of New York, is a continental

island.

The islands in rivers and lakes are also

continental islands. The city of Paris,

France, began as a settlement on an

island in the Seine River.

Archipelagoes

An archipelago is a group of islands. The

islands in archipelagoes may be oceanic

or continental. Japan and the Aleutian

Islands in the U.S. state of Alaska are

archipelagoes. Indonesia is the largest

archipelago in the world.

An atoll is a ring of land surrounding a pool of water called a lagoon. This kind of island

forms from a volcanic island circled by a coral reef.

A small continental island lies in the Seine

River near the town of Les Andelys, France.

BRITANNICA STUDENT ENCYCLOPEDIA Island 167

Israel

The country of Israel, located in the

Middle East, was founded in 1948. It

was the first homeland for the Jewish

people in nearly 2,000 years. Because

Israel lies in territory claimed by Arabs,

it has faced conflict with neighboring

Arab countries. Israel has also experienced

violence between Jews and Arabs

(known as Palestinians) living within its

borders. Israel claims Jerusalem as its

capital.

Geography

Israel borders Egypt, Jordan, Syria, and

Lebanon. The Mediterranean Sea lies to

the west. Israelis and the Arabs of the

region have long disagreed about the

limits of Israel’s territory.

Along the coast is a narrow plain. Hills

rise in northern and central Israel. The

country’s highest point, Mount Meron,

is in the mountains of Galilee in the

north. Several valleys run the length of

Israel in the east. In the south is a dry,

rugged region called the Negev.

In the east the Jordan River flows southward

into the freshwater Sea of Galilee

and the salty Dead Sea. The Dead Sea is

the lowest place on Earth. It is 1,312

feet (400 meters) below sea level. Israel

generally has mild, wet winters and hot,

dry summers.

Plants and Animals

Modern Israelis have planted millions of

trees to replace forests that were cut

down long ago. Shrubs cover the hills.

Desert scrub grows in the Negev. Citrus

trees grow on the coastal plain.

Israel’s animals include wildcats, wild

boars, gazelles, ibex, jackals, hyenas, and

badgers. Among its reptiles are lizards

and vipers. Birds include partridges,

tropical cuckoos, and desert larks.

The dry region known as the Negev takes

up a large part of Israel.

168 Israel BRITANNICA STUDENT ENCYCLOPEDIA

People

Jews make up more than three fourths

of the population. Jews from all over the

world began settling in the region even

before Israel became an independent

country in 1948. Most of the rest of the

people are Arabs. Judaism is the main

religion, but the majority of the Arabs

follow Islam. Hebrew and Arabic are the

main languages. Many people also speak

English. Most people live in cities,

mainly along the coast.

Economy

The economy of Israel is based on services,

including banking, government

work, and tourism. Manufacturing is

also important. The country is a top

producer of cut and polished diamonds.

Other products include electronics,

computer software, machinery, transportation

equipment, chemicals, metals,

processed foods, paper products, and

clothing.

Only a small number of people work in

agriculture, but Israel’s farms produce

much of the country’s food. Crops

include potatoes, tomatoes, citrus fruit,

wheat, grapes, apples, olives, and cotton.

The main livestock are sheep and cattle.

History

The territory now known as Israel is part

of a region called Palestine. The area was

the ancient homeland of the Jews. Long

ago it came under the control of other

rulers, though some Jewish people continued

to live there. In the 600s it

became part of the Muslim world. In the

late 1800s Jews began a movement,

called Zionism, to re-create a Jewish

state. The Arabs in Palestine opposed

the movement.

In 1918 the British occupied Palestine.

AfterWorldWar II (1939–45) the British

asked the United Nations to help

settle the disagreements between the

Jews and the Palestinian Arabs. In 1947

the United Nations voted to divide the

region into separate Jewish and Arab

states. Arab leaders refused to accept that

decision. The State of Israel declared its

independence in 1948.

The Arab-IsraeliWars

Egypt, Jordan, Syria, Lebanon, and Iraq

immediately declared war on Israel.

Israel won the war. It was the first of

several Arab-Israeli wars. In 1949 Israel

took control of three fourths of Palestine,

twice as much land as proposed by

the United Nations.

Israel gained more territory in the Six-

DayWar of 1967. It took the eastern

A worker unloads a bucket full of melons on

a moshav in Israel. A moshav is a kind of

cooperative farm. This means that many

people work together to farm the land. A

kibbutz is another form of cooperative farm

in Israel.

Facts About

ISRAEL

Population

(2008 estimate)

7,018,000

Area

8,367 sq mi

(21,671 sq km)

Capital

Israel claims

Jerusalem as its

capital

Form of

government

Republic

Major cities

Jerusalem, Tel

Aviv-Yafo, Haifa,

Rishon LeZiyyon,

Ashdod,

Beersheba

BRITANNICA STUDENT ENCYCLOPEDIA Israel 169

part of Jerusalem and theWest Bank

from Jordan, the Sinai Peninsula and the

Gaza Strip from Egypt, and the Golan

Heights from Syria. In 1973 Egypt and

Syria launched a surprise attack on

Israel. Israel lost many soldiers but eventually

won the war.

In 1979 Israel and Egypt signed a peace

treaty. However, Israel’s relations with

other Arab countries remained poor. In

1982 Israel invaded Lebanon. It wanted

to drive out Palestinian fighters

belonging to a group known as the

Palestine Liberation Organization

(PLO). In 1987 Palestinians living in

the West Bank and the Gaza Strip

began a violent protest (intifada in

Arabic) against Israel.

The Troubled Peace Process

Peace talks between Israel, the Arab

countries, and Palestinians began in

1992. The following year Israel agreed

to give the Palestinians some control of

the Gaza Strip and the West Bank.

Soon after that Israel signed a peace

treaty with Jordan. In 2000 Israeli

troops pulled out of Lebanon. Five

years later Israel pulled its troops and

settlers out of the Gaza Strip. The peace

process continued to face difficulties,

however.

#More to explore

Arab-IsraeliWars • Dead Sea • Jerusalem

• Jordan River • Middle East • Palestine

1897 1918 1948 1967 1987 1993 2000

Jews from

around the

world meet to

plan a Jewish

state.

Great Britain

occupies

Palestine.

Israel

declares its

independence;

the Arab-Israeli

wars begin.

Israel gains

more land in

the Six-Day

War.

Palestinians

begin a violent

uprising

against Israel.

Israel gives

Palestinians

some control of

the land.

New violence

breaks out

between Israel

and

Palestinians.

T I M E L I N E

Haifa is Israel’s main port. The city overlooks

the Mediterranean Sea.

170 Israel BRITANNICA STUDENT ENCYCLOPEDIA

Istanbul

Population

(2007 estimate)

10,757,327

Istanbul is the largest city in the country

of Turkey. A channel of water called the

Bosporus divides the city into two parts.

One part of Istanbul is in Europe, while

the other part is in Asia.

For more than 1,500 years Istanbul was

the capital of a series of powerful empires.

Today Ankara, not Istanbul, is the capital

ofTurkey.However, Istanbul is the center

ofTurkey’s economy and culture.

Places of Interest

A former church in Istanbul called the

Hagia Sophia is considered one of the

world’s greatest buildings. The church

was built in the 500s. It later became a

mosque and then a museum.

The Topkapi Palace in Istanbul was

home to the rulers of the Islamic Ottoman

Empire. Many mosques were built

in the city during their rule. They

include the large Mosque of Suleyman

and the Blue Mosque.

Economy

Istanbul is Turkey’s center of trade,

banking, tourism, and other service

industries. The city is also an industrial

center. Factories in Istanbul make fabrics,

clothing, processed foods, chemicals,

and cement.

History

The Greeks founded the city as a

colony in about the 600s BC. They

named it Byzantium. In AD 330 the

Roman emperor Constantine made the

city the capital of the Roman Empire.

He renamed the city Constantinople.

The eastern part of the Roman Empire

later became the Byzantine Empire.

Constantinople was its capital for many

centuries.

The Ottoman Turks captured Constantinople

in 1453. They made it the capital

of the huge Ottoman Empire. Under

Ottoman rule the city became known as

Istanbul. The Ottoman Empire ended in

1918. Istanbul soon became part of the

new country of Turkey.

..More to explore

Ankara • Byzantine Empire • Ottoman

Empire • Rome, Ancient • Turkey

The Blue Mosque (front) is one of several

magnificent mosques in Istanbul.

BRITANNICA STUDENT ENCYCLOPEDIA Istanbul 171

Italy

The European country of Italy is shaped

like a high-heeled boot. Two thousand

years ago the capital of Italy, Rome,

ruled one of history’s largest empires.

Today Italy is an important member of

the European Union.

Geography

Most of Italy’s land is a peninsula that

extends from southern Europe into the

Mediterranean Sea. Sicily and Sardinia

also belong to Italy. They are two large

islands in the Mediterranean. Italy shares

borders with France, Switzerland, Austria,

and Slovenia. The Adriatic Sea lies

to the east. Italy’s longest river, the Po,

flows into the Adriatic.

Italy’s land is mountainous. The Alps

rise in the north, and the Apennines run

through the peninsula. Italy’s highest

point, Monte Rosa, lies in the central

Alps. Southern Italy has some active

volcanoes, including Mount Vesuvius

and Mount Etna. The south is generally

warmer than the north.

Plants and Animals

At the foot of the Alps, the most common

trees are evergreen cork oaks,

olives, and cypresses. Beech trees grow

slightly higher up. At still higher elevations

grow larches and spruces. Holm

oaks grow in the Apennines.

Most of Italy’s animals live in the

mountains. Wolves hunt in the remote

Apennines. Brown bears, lynx, ibex, and

other animals are protected in parks

and preserves in the Alps and the

Apennines.

People

Nearly all the people in Italy are ethnic

Italians. Almost everyone speaks Italian.

Most Italians are Roman Catholics. The

majority of the population lives in cities.

The largest city is Rome. In the western

part of Rome is Vatican City, an independent

state and the headquarters of

the Roman Catholic church.

A man in Italy harvests grapes that will be

used to make wine.

172 Italy BRITANNICA STUDENT ENCYCLOPEDIA

Economy

Services—including tourism, banking,

and communications—are Italy’s main

economic activities. Manufacturing is

also very important. Italy’s main products

include iron and steel, machinery,

automobiles, electrical appliances, textiles,

chemicals, ceramics, and shoes.

Italy has few natural resources. It must

import many of the raw materials

needed for industry.

Agriculture is a smaller part of the

economy. Some leading farm products

are wheat, olives, and grapes. Wheat

flour is used in making bread and pasta,

one of the main Italian foods. Olives

provide olive oil for cooking. Grapes are

used to make wine. Other crops include

sugar beets, corn, tomatoes, potatoes,

rice, and various fruits. Farmers also

raise sheep, pigs, cattle, and chickens.

Fishing is another important source of

food.

History

More than 2,500 years ago a group of

people known as the Etruscans began

building a civilization in west-central

Italy. The Etruscans later fell under the

control of the Romans, their neighbors

to the south. Rome became the chief

power in the Mediterranean world. By

AD 117 the Roman Empire stretched

from Britain to North Africa to what is

now the Middle East.

Later, groups of people from the north

invaded the Roman Empire. By AD 476

they had destroyed the empire. After

that the region was divided into many

small kingdoms. Various rulers tried to

control the different kingdoms. The

most important of these local rulers,

however, was the pope. The pope was

the leader of the Roman Catholic

church and was based in Rome.

City-States and the Renaissance

During this period some cities in northern

Italy developed into small but powerful

states. They were called city-states.

Among them were Florence, Venice, and

Milan. These city-states competed

intensely for the control of trade

between Europe and Asia.

As the city-states gained wealth from

trade, they became centers of art. Their

rulers and merchants encouraged architecture,

painting, sculpture, and literature.

This growing interest in the arts is

known as the Renaissance. It made Italy

the cultural center of theWestern world

from the 1300s to the 1500s.

From Foreign Rule to Unification

In the late 1400s France invaded Italy.

Until the 1800s rulers from France,

Spain, and Austria controlled the various

parts of Italy.

The Italian city of Florence is known for its

many famous museums and churches.

Facts About

ITALY

Population

(2008 estimate)

59,760,000

Area

116,343 sq mi

(301,328 sq km)

Capital

Rome

Form of

government

Republic

Major cities

Rome, Milan,

Naples, Turin,

Palermo, Genoa

BRITANNICA STUDENT ENCYCLOPEDIA Italy 173

In the 1800s three men began to fight

against the foreign rulers. Their names

were Giuseppe Mazzini, Giuseppe

Garibaldi, and Camillo Cavour. They

forced the rulers to leave. They then

brought all the parts of Italy together as

one country. By 1861 most of Italy was

united under Victor Emmanuel II, who

became king. The pope still controlled

Rome, but in 1870 Italian troops

invaded the city and took control. This

completed the unification of Italy.

Mussolini andWorldWar II

Italy joined the Allies—Russia, France,

and Great Britain—during WorldWar I

(1914–18). After the war Italians were

divided on many issues. Many wanted a

strong leader to take charge. The dictator

Benito Mussolini and his Fascist

party soon rose to power. (Fascists

believe that the strength of the country

is all-important.) Mussolini ruled

harshly. People who criticized him were

imprisoned, sent far away, or killed.

Italy formed an alliance with Nazi Germany

in 1936. In 1940 Mussolini

brought Italy intoWorldWar II on Germany’s

side. When the Allies invaded

Italy in 1943, Mussolini escaped. Italy

surrendered to the Allies and then joined

the war against Germany.

Postwar Italy

After the war, in 1946, the Italian people

voted to make the country a republic. (A

republic is a country not ruled by a king

or queen.) Italy developed many political

parties and had more than 50

changes in government by the 21st century.

Nevertheless, the economy grew to

be one of the strongest in the world.

Italy was a founding member of the

European Economic Community, which

became the European Union in 1993.

#More to explore

European Union • Fascism

• Renaissance • Rome • Rome, Ancient

• Vatican City

about 476 about 1350 1870 1922 1940 1946 1993

The Roman

Empire falls.

The

Renaissance

begins in Italy’s

city-states.

Italy becomes a

united

kingdom.

Fascist leader

Benito

Mussolini

comes to

power.

Italy sides with

Germany in

World War II.

The Italian

Republic is

founded.

Italy becomes

part of the

European

Union.

T I M E L I N E

174 Italy BRITANNICA STUDENT ENCYCLOPEDIA

Ivan IV

Ivan IV ruled the country of Russia

from 1533 to 1584. In 1547 he became

Russia’s first tsar. The tsar was the country’s

highest leader at that time.

Although Ivan made improvements to

his country during his reign, he is

remembered mostly for his cruelty. He is

also called Ivan the Terrible.

Ivan was born in 1530 to Grand Prince

Vasily III of Moscow and his second

wife, Yelena Glinskaya. On December 4,

1533, Ivan’s father died. The 3-year-old

Ivan then became grand prince of Moscow.

Ivan’s mother ruled for him until

her death in 1538.

As Russia’s leader, Ivan hoped to make

the country more powerful. He created

new laws and reorganized the government.

He also improved the military and

encouraged the development of Russian

culture. But he mistreated many people

who opposed him. He had more than

3,000 people killed. He even struck and

killed his son Ivan. After Ivan IV died in

1584, his son Fyodor became tsar.

Ivory Coast

#see Cote d’Ivoire.

Ivy

Ivy is a vine that is known for clinging

to walls and trees. It grows in cool, moist

regions. There are several types of ivy,

but the most common is English ivy.

Ivy is native to Europe, Asia, and North

Africa. Many varieties of ivy have been

introduced throughout the world.

Ivy clings to walls and trees with disks

that grow from the stems. As the stems

reach the top of their support, they

either grow to the side or hang. Leaves

with three to five sections grow from the

stems. Ivy does not harm trees as long as

the plant is not allowed to grow too

much. If it does grow wildly, it may

strangle the tree. Ivy is also used as a

ground cover beneath large trees where

grass has difficulty growing. It is also a

popular houseplant.

Some ivy growing on brick walls can be

good. It encourages dryness and

warmth. It also protects the wall from

bad weather and adds beauty. However,

if the ivy starts growing through cracks

in the wall, the wall may be damaged.

Several other plants are called ivy though

they are not related to the true ivies.

These include poison ivy and Virginia

creeper.

Ivy often covers brick buildings.

BRITANNICA STUDENT ENCYCLOPEDIA Ivy 175

Britannica

Student

Encyclopedia

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Volume 7

2010 Britannica Student Encyclopedia

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International Standard Book Number: 978-1-61535-363-7

eBook edition January, 2010

Jakarta is the capital of

Indonesia, a country in

Southeast Asia.

(See Jakarta.)

Jamestown was the first permanent

English colony in North

America.

(See Jamestown.)

During the 1100s in Japan,

warriors called samurai set up

a military government.

(See Japan.)

In 1917 the Original Dixieland

Jass Band made the first jazz

recording.

(See Jazz.)

Thomas Jefferson wrote the

famous line “all men are created

equal.”

(See Jefferson, Thomas.)

Some jellyfish are more than 6

feet (2 meters) across.

(See Jellyfish.)

J

Jackal

Jackals are wolflike animals that are

related to dogs. At night jackals howl to

communicate with each other. The howl

can be quite bothersome to humans.

People often describe the noise as sounding

like loud crying or a siren.

There are three species, or types, of

jackal. The golden jackal is found from

eastern Europe and North Africa to

southern Asia. The black-backed jackal

and the side-striped jackal are found in

southern and eastern Africa. Jackals live

in open spaces such as grasslands.

An adult jackal is about 3 feet (1 meter)

long, including the tail. It weighs about

15–24 pounds (7–11 kilograms). A jackal’s

fur color depends on what species it

is. The golden jackal is usually yellow to

pale gold. The black-backed jackal is

rusty red with a black back. The sidestriped

jackal is grayish with a whitetipped

tail and a stripe on each side of

the body.

Jackals live alone, in pairs, or in groups

called packs. They hide during the day

and come out at dusk to hunt. They eat

small animals and plants. Packs of jackals

can catch sheep and antelope. Jackals

also follow lions that are hunting. Once

the lion has eaten and gone, the jackals

move in and eat the scraps that are left.

..More to explore

Dog

Jackson

Population

(2000 census)

184,256;

(2007 estimate)

175,710

Jackson is the capital of the U.S. state of

Mississippi. It is the state’s largest city. It

lies along the Pearl River.

Jackson is a center of manufacturing and

transportation. Goods made in the surrounding

areas are shipped out from

Jackson. Many residents work for the

government or in communications.

A French Canadian named Louis Le

Fleur built a trading post on the site of

Jackson in 1792. It was called Le Fleur’s

Bluff. In 1822 it became the capital of

Mississippi. It was then renamed after

Andrew Jackson, the seventh president

of the United States.

During the American CivilWar, Union

troops burned down Jackson. The city

Black-backed jackals are widespread in

southern Africa.

4 Jackal BRITANNICA STUDENT ENCYCLOPEDIA

then became known as Chimneyville.

Jackson recovered slowly after the war. It

grew rapidly during the 1900s.

#More to explore

Mississippi

Jackson, Andrew

Known as Old Hickory, Andrew Jackson

served two terms as the seventh president

of the United States. Jackson was

the first president to have grown up

poor and on the western frontier. He

made the presidency more powerful and

helped to found the Democratic Party.

Early Life and Career

Andrew Jackson was born on March

15, 1767, in the western Carolinas,

probably in what is now South

Carolina. A few days before Andrew

was born, his father died. His mother

and two brothers died during the

American Revolution.

Jackson studied law at an office in Salisbury,

North Carolina. After 1788 he

worked as a lawyer in a what later

became Tennessee. Jackson married

Rachel Donelson Robards in 1791.

They later adopted Robards’ nephew

and named him Andrew Jackson, Jr.

In 1796 Jackson helped write the

constitution for the new state of

Tennessee. The state’s voters elected

him as their first representative to the

U.S. House of Representatives. In

1797–98 he served as a U.S. senator.

Jackson then became a judge for the

highest court in Tennessee.

Military Career

In 1802 Jackson became major general

of the Tennessee militia. During the War

of 1812 with Great Britain Jackson

fought the Creek Indians, who were

British allies. He defeated them in the

battle of Horseshoe Bend, in Alabama.

Jackson later forced the British to leave

New Orleans, Louisiana. He became a

national hero.

The state Capitol in Jackson, Mississippi, is

nestled between high-rise buildings.

Neither Jackson

nor the

British knew

that the War

of 1812 was

officially over

when they

fought the

battle of New

Orleans.

Andrew Jackson was the seventh

president of the United States.

BRITANNICA STUDENT ENCYCLOPEDIA Jackson, Andrew 5

After the war Jackson went to the

Alabama-Georgia region. He was supposed

to defend settlers against attacks

by Seminole Indians from Florida. In

1818, without orders, he led his troops

to Florida, which belonged to Spain.

The next year, Spain agreed to give up

Florida.

Presidential Elections

In 1823 Jackson returned to the Senate.

The next year he ran against three other

candidates for president. Jackson won

the highest number of votes but not a

majority. The decision went to the

House of Representatives, which chose

John Quincy Adams.

Jackson ran for the presidency again in

1828. His war record and background

attracted voters. They saw him as a man

of the people, not a rich politician from

the East.With the support of the western

states, Jackson defeated President

Adams. Jackson’s supporters formed the

new Democratic Party, which helped

him win a second term in 1832.

Presidency

Jackson relied on the advice of some of

the journalists and politicians who had

helped elect him. That informal group

came to be known as his “kitchen cabinet.”

(The Cabinet is the president’s

official group of advisers.)

As president, Jackson ended the powerful

Bank of the United States. He also

strengthened the central government by

opposing the rights of states to make

their own decisions in certain cases.

When South Carolina threatened to

ignore a federal law, Jackson said he

would send soldiers to enforce it.

In another case, however, Jackson

allowed Georgia to ignore the U.S.

Supreme Court. The state had taken

lands from the Cherokee people. The

Supreme Court ruled against Georgia,

but Jackson did nothing to enforce the

March 15, June 8,

1767 1796 1815 1818 1828 1837 1845

Jackson is

born in the

Carolinas.

Tennessee

elects Jackson

as its first

representative

to Congress.

Jackson defeats

the British in

the battle of

New Orleans.

Jackson

invades

Spanish

Florida.

Jackson is

elected

president.

Jackson retires

at the end of

his second

term.

Jackson dies at

his home near

Nashville,

Tennessee.

T I M E L I N E

6 Jackson, Andrew BRITANNICA STUDENT ENCYCLOPEDIA

ruling. Georgia later forced about

15,000 Cherokee to leave. Their march

west became known as the Trail of

Tears.

Retirement

In 1837 Jackson retired to his home, the

Hermitage, near Nashville, Tennessee.

His wife had died after his election in

1828. Jackson’s health grew worse until

he died at home on June 8, 1845.

#More to explore

Adams, John Quincy • Trail of Tears

• United States •War of 1812

Jackson, Jesse

Jesse Jackson fought for the rights of

African Americans during the civil rights

movement of the 1960s. Later on he

became involved in politics and world

affairs.

Jesse Jackson was born onOctober 8,

1941, in Greenville, South Carolina.He

went to college at the University of

Illinois and at North Carolina

Agricultural andTechnical College. Then

he studied religion in Chicago, Illinois.

In 1968 he became a Baptist minister.

Jackson joined the civil rights movement

while he was a student. In 1965 he

began working for the Southern Christian

Leadership Conference (SCLC).

The SCLC was a civil rights group led

by Martin Luther King, Jr.

In 1971 Jackson founded the group

People United to Save [or Serve]

Humanity (PUSH). This group helped

African Americans to get jobs and to

open businesses. In 1984 Jackson

founded the National Rainbow Coalition

to help all kinds of people, not just

African Americans. (These two groups

joined in 1996 to form the Rainbow/

PUSH Coalition.)

Jackson ran for U.S. president as a

Democrat in 1984 and 1988. He did

not win. But he did better than any

African American presidential candidate

who had come before.

Jackson also gained a lot of attention for

his role in world affairs. He spoke out

against apartheid (separation of the

races) in South Africa. He took part in

peace talks in the Middle East. He also

worked with several countries to free

U.S. citizens being held as prisoners.

#More to explore

Civil Rights Movement • King, Martin

Luther, Jr.

In 1990

Washington,

D.C., residents

elected Jackson

as a

“statehood

senator.” His

job was to try

to get statehood

for the

city.

Jesse Jackson

BRITANNICA STUDENT ENCYCLOPEDIA Jackson, Jesse 7

Jaguar

The jaguar is the largest cat that lives in

the Americas. It is found mainly in the

Amazon rain forest of South America.

The scientific name of the jaguar is Panthera

onca.

The jaguar looks much like the leopard.

But the jaguar is larger and has bigger

black spots. The average jaguar is

between 5 and 6 feet (1.5 and 1.8

meters) long, not including the tail.

Males weigh between 220 and 350

pounds (100 and 160 kilograms).

Females are usually smaller. The jaguar

has a large head and big legs. Its coat

ranges from deep yellow to golden

brown.

The jaguar hunts alone at night. It is a

swift animal that climbs and swims well.

The jaguar preys on piglike animals

called peccaries. It also eats rodents,

deer, birds, crocodiles, and fish.

The jaguar once lived in forests ranging

from the southern United States to

Argentina. Today there are far fewer

jaguars scattered over a much smaller

area. Some of the forests have been

destroyed. The animals therefore have

fewer places to live. People hunt jaguars

for sport and for their fur. People also

kill jaguars because the animals sometimes

eat cattle.

#More to explore

Cat • Leopard

Jail

#see Prison.

Jainism

Along with Hinduism and Buddhism,

Jainism is one of the three major religions

that started in ancient India. Its

followers are called Jains. In the early

21st century there were more than 4

million Jains, most of them in India.

Jains believe that after people die, they

are reborn as other beings. By purifying

their souls, they believe, they can eventually

free themselves from repeated

rebirth. Jains believe that 24 men, the

Tirthankaras (saviors), have escaped

rebirth.

For Jains, purifying the soul involves

practicing ahimsa, or nonviolence. This

means that they should not harm any

living thing, including humans, animals,

and insects. Also, Jains believe that no

group of people is above or below any

other group.

The jaguar gets its name from the American

Indian word yaguar, meaning “he who kills

with one leap.”

8 Jaguar BRITANNICA STUDENT ENCYCLOPEDIA

To avoid harming living things, Jains do

not eat any meat. In temples and at

shrines they pay respect to the 24

Tirthankaras. At certain times they fast,

or refuse to eat, to help purify the soul.

Jain monks and nuns follow Jainism

more strictly. They dedicate their lives to

purifying their souls.

Jainism began during the 600s–400s BC

in eastern India. Hinduism was the

main religion there. But some people

rejected certain Hindu beliefs, including

the idea that only the highest group of

people could perform religious ceremonies.

Some of these opponents of Hinduism

founded Jainism.

Jains believe their religion started with

the 24 Tirthankaras. Mahavira, who

probably lived in the 500s or 400s BC,

was the last savior. Mahavira taught

people how to purify their souls. He

converted many Hindus to his ideas,

later called Jainism.

..More to explore

Buddhism • Hinduism • Monk

Jakarta

Population

(2005 estimate)

8,603,349

Jakarta is the capital of Indonesia, a

country of Southeast Asia. It is one of

the largest cities in the world. Jakarta is

located on the coast of the island of Java.

Jakarta is a major center of education,

industry, banking, and trade. It is the

country’s largest port. Its factories make

soap, cloth, food, and machines.

Jakarta was founded in 1527 after a local

ruler defeated Portuguese troops there.

He called the city Jayakerta, meaning

“glorious fortress.”

Dutch traders captured and destroyed

the city in 1619. They then built their

own town, named Batavia, there. It

became the capital of the Dutch government

in Indonesia.

Indonesia became an independent country

in 1949. The city was renamed

Djakarta, and it became the capital. In

1972 the city was renamed Jakarta.

..More to explore

Indonesia

Jain people in India celebrate a

festival by pouring holy water

over a statue.

Jakarta has

many citizens

of Chinese,

Indian, and

Arab ancestry.

BRITANNICA STUDENT ENCYCLOPEDIA Jakarta 9

Jamaica

Jamaica is part of theWest Indies in the

Caribbean Sea. Jamaica is known for

reggae, a type of music. The capital is

Kingston.

Geography

Jamaica lies south of Cuba and west of

Haiti. The island is mountainous with

plains along the coast. Jamaica has warm

weather year-round. Hurricanes sometimes

cause severe destruction.

Plants and Animals

Ebony, mahogany, and rosewood trees

grow in some valleys. Other plants

include bamboo, orchids, and ferns.

Jamaica is home to birds, bats, frogs,

and crocodiles.

People

Most of Jamaica’s people are of African

origin. A smaller group has mixed African

and European roots. There are also

small numbers of East Indians, Chinese,

and whites. Most people speak English

or Jamaican Creole. More than half of

Jamaicans live in cities.

Economy

Jamaica’s economy is based mainly on

services, especially tourism. Mines provide

the mineral bauxite, from which

aluminum is made. Factories make

cement, processed foods, and clothing.

Farmers grow sugarcane to make raw

sugar, molasses, and rum. Other crops

are citrus fruits, bananas, and coffee.

History

The Arawak people lived on the island

when Christopher Columbus sighted it

in 1494. The Spanish took control in

the early 1500s and enslaved many

Arawak. The British seized Jamaica in

1655. They brought in Africans to work

as slaves on sugar plantations. Jamaica

gained independence in 1962.

..More to explore

Arawak • Kingston •West Indies

Many people visit Jamaica for its beautiful

beaches and mild weather.

Facts About

JAMAICA

Population

(2008 estimate)

2,688,000

Area

4,244 sq mi

(10,991 sq km)

Capital

Kingston

Form of

government

Constitutional

monarchy

Major cities

Kingston, Portmore,

Spanish

Town, Montego

Bay, May Pen

10 Jamaica BRITANNICA STUDENT ENCYCLOPEDIA

Jamestown

Jamestown was the first permanent

English colony in North America. It was

located on a piece of land in the James

River, near what is nowWilliamsburg,

Virginia.

The people who founded Jamestown

were members of the Virginia Company

of London. King James I of England

gave them the right to settle along the

east coast of North America. Their goal

was to find ways to make money.

The 105 colonists, all men, arrived in

North America in May 1607. Life in the

colony was hard. Many colonists died

from illness and lack of food.

Conditions in Jamestown improved

under the leadership of Captain John

Smith. Under his direction, the colonists

built houses and forts and dug a well.

They also fished and planted crops.

After being injured, Smith returned to

England in the autumn of 1609.

The Native Americans of the region,

called the Powhatan confederacy, sometimes

gave the colonists food. But the

two groups did not always trust each

other.

After Smith left, the Native Americans

stopped sharing food with the colonists.

They also attacked colonists who left

Jamestown. As a result more than 80

percent of the colonists died during the

winter of 1609–10. This period was

called the Starving Time.

More colonists arrived in 1610. In 1612

a colonist named John Rolfe began

growing tobacco. The colonists sold

tobacco to England, which helped

Jamestown to survive.

In 1614 Rolfe married Pocahontas, the

daughter of the chief of the Powhatan

confederacy. This brought eight years of

peace between the colonists and the

Native Americans.

The colonists formed a democratic government

in 1619. In the same year the

first Africans arrived. The colonists

treated Africans first as servants and later

as slaves.

In 1624 Virginia became a royal colony,

ruled by the king of England. Jamestown

was Virginia’s capital at first. In

1699 the capital was moved toWilliamsburg.

Today the site of Jamestown

is part of Colonial National Historical

Park.

#More to explore

Americas, Exploration and Settlement of

the • Colony • Pocahontas • Virginia

The first colonists built Jamestown on a

marshy piece of land on the James River.

BRITANNICA STUDENT ENCYCLOPEDIA Jamestown 11

Japan

The Asian country of Japan is marked

by contrast between old and new. The

country values its complex and ancient

cultural traditions. Yet Japan is known

for its powerful, modern economy and

its advanced technology. Japan’s capital

is Tokyo.

Geography

Japan is located off the east coast of Asia.

It consists of four large islands and more

than 3,900 smaller islands. The islands

form an arc that stretches across about

1,500 miles (2,400 kilometers). From

north to south the main islands are

Hokkaido, Honshu, Shikoku, and

Kyushu. The largest is Honshu, which is

considered the Japanese mainland.

The Pacific Ocean borders Japan’s eastern

shores. On the west the Sea of Japan,

also called the East Sea, separates Japan

from North Korea, South Korea, and

Russia. China is to the southwest, across

the East China Sea.

Mountains cover most of the land. Some

mountains are active volcanoes. Mount

Fuji, in central Honshu, is Japan’s highest

point. It is 12,388 feet (3,776

meters) high.

The southern islands are generally

warmer than the northern ones. All the

islands receive plenty of rain. Japan also

experiences hundreds of earthquakes

every year.

Plants and Animals

Forests cover a large part of Japan. The

country’s evergreen trees include pines,

cypresses, hemlocks, cedars, firs, and

spruces. Numerous broad-leaved trees

include oaks, maples, ashes, birches,

beeches, and poplars. Bamboo and

palms grow in southern and central

Japan. Cherry trees are known as sym-

Cherry flowers surround a pagoda in

Kyoto, Japan. A pagoda is a tower that

may serve as a temple or a memorial.

12 Japan BRITANNICA STUDENT ENCYCLOPEDIA

bols of Japan. The Japanese plant them

throughout the country. They also grow

wild in the mountains.

Many animals live in the forested

mountains. Mammals include bears,

foxes, deer, wild boars, antelope, hares,

and wild monkeys. The seas are home

to whales, dolphins, porpoises, and a

wide variety of fish. The raising of

goldfish and colorful carp is a Japanese

specialty.

People

Most Japanese people share the same

ethnic and cultural background. They

are closely related to the other peoples of

East Asia. One group of Japanese, the

burakumin (people of the village), often

live in poorer conditions than other

Japanese. Their ancestors belonged to

the lowest class in traditional Japanese

society. Koreans form the largest minority

group. There are also small numbers

of Ainu, a native people of northern

Japan.

The country’s main language is Japanese.

Shinto and Buddhism are the

major religions. Most Japanese live in

cities, mainly on Honshu.

Economy

Most Japanese work in services, including

banking, health care, and communications.

Manufacturing and

international trade are also strong parts

of the economy. Japan is a leading maker

of ships, automobiles, watches, and

electronics—especially cellular phones,

television sets, computers, cameras, photocopiers,

and robots. Japan also produces

steel, chemicals, plastics, cement,

fabrics, and paper.

Farming and fishing are small parts of

the economy. Nevertheless, Japan produces

large amounts of food. Its leading

crops include rice, potatoes, sugar beets,

fruits, vegetables, and tea. Japan also

catches more fish than most other countries

do.

History

People lived in Japan at least 10,000

years ago. According to legend, the

emperor Jimmu founded the Japanese

state in 660 BC. Historical records, however,

show that Japan was not united as

one state until the late AD 300s or early

400s.

For many centuries the Japanese borrowed

heavily from Chinese culture.

The Japanese adopted Chinese characters

to write the Japanese language. They

also used some Chinese ideas about government.

Japan’s culture became more

Japanese after the 800s.

Japanese Kabuki plays are colorful combinations

of singing, dancing, mime, and

drama.

Facts About

JAPAN

Population

(2008 estimate)

127,674,000

Area

145,903 square

miles (377,887

square

kilometers)

Capital

Tokyo

Form of

government

Constitutional

monarchy

Major cities

Tokyo, Yokohama,

Osaka,

Nagoya,

Sapporo

BRITANNICA STUDENT ENCYCLOPEDIA Japan 13

Military Government

During the 1100s a class of warriors

called samurai rose to power. The samurai

often managed the estates of wealthy

people, and sometimes they held land

themselves. The samurai developed

advanced military skills.

In 1185 a samurai named Minamoto

Yoritomo took control of Japan. In 1192

he took the title of shogun. His military

government was called a shogunate.

Japan had an emperor, but he held less

power than the shogun.

From the 1300s to the 1500s powerful

families fought each other for control of

Japan. The country was divided into

private estates ruled by the landowners.

The shogun and the emperor became

less powerful.

Meanwhile Japan was developing trade

contacts with the outside world. Trade

missions to China began in 1404. In

1543 Portuguese traders arrived in

Japan. Spanish, English, and Dutch

traders followed.

The division and disorder in Japan

ended in the late 1500s. Powerful leaders

defeated the local landowners and

united the country.

During the 1600s and 1700s strong

shoguns of the Tokugawa family ruled

Japan. Japan enjoyed peace, stability,

and a growing economy. At the same

time, the shoguns began to fear conquest

by foreign powers. They banned

Christianity (a foreign religion), stopped

foreign travel, and cut back on foreign

trade.

By the mid-1800s the Tokugawa shogunate

was unable to keep European

and U.S. traders away. The shogun’s

support among the Japanese people collapsed.

In 1868 the shogun was forced

to step down.

about 400 1192 1635 1868 1941 1945 2001

Japan becomes

a unified

kingdom.

The samurai set

up a military

government, or

shogunate.

Japan bans its

people from

traveling

overseas.

The emperor

Meiji takes

power and

modernizes

Japan.

The Japanese

attack Pearl

Harbor,

Hawaii.

The United

States drops

atomic bombs

on Japan.

Junichiro

Koizumi

becomes

Japan’s 87th

prime minister.

T I M E L I N E

14 Japan BRITANNICA STUDENT ENCYCLOPEDIA

The Japanese Empire

Japan set up a new government under an

emperor who took the name Meiji,

meaning “enlightened government.” The

transfer of power from the shogunate to

the Meiji emperor was the start of

Japan’s modern era.

Japan soon started to build an empire. It

defeated China and Russia in war. It

made Korea into a Japanese colony in

1910. During WorldWar I (1914–18),

Japan fought on the side of the Allies

(mainly Great Britain, France, and Russia).

Japan seized additional territory in

East Asia during the war.

WorldWar II

In 1931 Japan seized the region called

Manchuria from China. Japan moved

troops into China in 1937 and into

Southeast Asia in 1940. The Japanese

also formed an alliance with Germany

and Italy. The three countries were

known as the Axis powers. They fought

against the Allies duringWorldWar II

(1939–45).

In 1941 Japan attacked U.S. forces at

Pearl Harbor, Hawaii. The attack pulled

the United States into the war. In 1945

the United States dropped atomic

bombs on the Japanese cities of

Hiroshima and Nagasaki. The bombs

destroyed large parts of the cities and

killed more than 100,000 people. The

Japanese then surrendered.

Postwar Japan

After the war Japan had to give up all

the territory it had acquired since 1895.

It also broke up its military. In addition,

U.S. forces occupied Japan until 1952.

A new constitution in 1947 took power

away from the emperor and made Japan

more democratic.

Japan rebuilt its ruined economy with

the help of new technology. By 1990

Japan had one of the world’s largest

economies. Although economic growth

slowed in the 1990s, Japan remained

one of the richest countries in the world.

#More to explore

Fuji, Mount • Hiroshima • Samurai

• Shinto • Tokyo •WorldWar II

Girls wear traditional clothing at a festival

in Kanazawa, Japan. Many Japanese cities,

towns, and temples hold local festivals.

Crowds of people cross a street in a busy

Japanese city. Japan has many large cities.

BRITANNICA STUDENT ENCYCLOPEDIA Japan 15

Jazz

Jazz is a type of music. It began among

African Americans. Today jazz is popular

all over the world.

Features

There are many different kinds of jazz

music. But most jazz is at least partly

improvised. This means that a jazz

musician composes (makes up) the

music while playing it, rather than

beforehand.

Jazz bands can have many different types

of instruments. They often feature

drums, piano, bass, trumpet, trombone,

and saxophone. Jazz often includes singers,

too.

History

In the 1700s and 1800s enslaved people

from Africa brought their music to the

United States. Jazz grew from a mix of

African and European music. Ragtime, a

form of piano music, and blues music

also influenced jazz.

New Orleans, Louisiana, is often called

the home of jazz. Many important early

jazz musicians, such as pianist Jelly Roll

Morton, were from New Orleans. In

1917 the Original Dixieland Jass Band,

a New Orleans band, made the first jazz

recording.

In about 1918 many musicians from

New Orleans began heading north. Chicago,

Illinois, quickly became the jazz

capital of the United States. New York

City became an important center for

jazz, too.

Louis Armstrong was an important jazz

musician from this time. Armstrong’s

style of jazz became known as swing. It

was popular throughout the 1930s and

1940s. Other famous swing musicians

included orchestra leader Benny Goodman

and singer Billie Holiday.

Another popular type of jazz music was

called big-band jazz. Large orchestras

with many musicians played this kind of

jazz. Duke Ellington was a famous jazz

musician, composer, and big-band

leader. Count Basie was another wellknown

bandleader.

Jazz music continued to grow and

change throughout the 1950s and

1960s. Some famous jazz musicians

from this time include saxophonist

Charlie Parker and trumpeter Miles

Davis.

During the 1970s and 1980s musicians

from many countries created new kinds

of jazz. The result was fusion music.

The Preservation Hall Jazz Band performs

in New Orleans, Louisiana.

16 Jazz BRITANNICA STUDENT ENCYCLOPEDIA

This kind of music combined jazz, rock,

and Latin American music.

#More to explore

Armstrong, Louis • Blues • Music

Jefferson,

Thomas

Thomas Jefferson was the chief author

of the Declaration of Independence and

the third president of the United States.

Many people praise Jefferson as someone

who believed strongly in the ideas of

democracy, equality, and freedom. At

the same time, however, he owned

slaves, and that has caused some people

to question his beliefs.

Early Life

Thomas Jefferson was born on April 13,

1743, in Shadwell, Virginia. His parents

were Peter Jefferson, a land surveyor,

and Jane Randolph, a member of a rich

family. The Jeffersons lived on a plantation

with slaves. Jefferson studied at a

boarding school and atWilliam and

Mary College inWilliamsburg, Virginia.

In 1767 he became a lawyer. The next

year he designed his own home, named

Monticello, near Shadwell.

Jefferson married MarthaWayles Skelton

on New Year’s Day in 1772. They

had six children. Skelton died after 10

years of marriage, and Jefferson never

remarried.

Political Career

Jefferson was elected to the Virginia

legislature in 1769. He became a strong

supporter of American independence

from Great Britain. He served as Virginia’s

delegate to the Continental Congress

in 1775 and 1776. In 1776 he was

the main author of the Declaration of

Independence. He wrote the famous

lines that said “all men are created

equal” and have the rights of “life, liberty

and the pursuit of happiness.”

Jefferson then returned to the Virginia

legislature. There he proposed ending

the privileges of the wealthy, making

education available to all citizens, and

separating church and state. In 1779

Jefferson was elected governor of Virginia.

Many criticized him for not

defending the state from a British attack

in 1780. In 1782 Jefferson reentered the

Continental Congress. After the American

Revolution ended, he replaced Benjamin

Franklin as U.S. minister to

France.

Thomas Jefferson was the third president of

the United States.

Thomas

Jefferson and

John Adams

both died on

the same

day—the 50th

anniversary

of U.S.

independence.

BRITANNICA STUDENT ENCYCLOPEDIA Jefferson, Thomas 17

During 1790–93 Jefferson was the first

U.S. secretary of state, under President

George Washington. Jefferson clashed

with Alexander Hamilton, the secretary

of the treasury. Jefferson and his

supporters, called Republicans (or

Democratic-Republicans), believed that

the states should have the power to

make their own decisions in most

matters. Hamilton led the Federalists,

who believed in a powerful central

government. In 1796 Jefferson was

elected vice president under President

John Adams.

Presidency

In 1800 Jefferson and Aaron Burr ran

for president against President Adams.

Jefferson and Burr received the same

number of electoral votes. The House of

Representatives eventually chose Jefferson

as the winner.

The most important event of Jefferson’s

first term was the purchase of a large

area of land known as the Louisiana

Territory from France in 1803. The territory

doubled the size of the United

States. The president launched the Lewis

and Clark Expedition to explore the new

territory. Jefferson easily won reelection

in 1804, but his second term was less

successful than the first. A war between

Britain and France hurt U.S. trade with

Europe.

Retirement

In 1809 Jefferson retired to Monticello,

where he wrote, looked after his estate,

and entertained friends. His last great

project was founding the University of

Virginia at Charlottesville. Jefferson died

on July 4, 1826.

#More to explore

Adams, John • American Revolution

• Declaration of Independence

• Democracy • Hamilton, Alexander

• Lewis and Clark Expedition

• Louisiana Purchase • Slavery • United

States

April 13, July 4,

1743 1776 1796 1800 1803 1809 1826

Jefferson is

born in

Shadwell,

Virginia.

Jefferson

writes the

Declaration of

Independence.

Jefferson is

elected vice

president under

President John

Adams.

Jefferson is

elected

president.

The Louisiana

Purchase

doubles the

size of the

United States.

Jefferson retires

after a second

term.

Jefferson

dies at his

home near

Charlottesville,

Virginia.

T I M E L I N E

18 Jefferson, Thomas BRITANNICA STUDENT ENCYCLOPEDIA

Jefferson City

Population

(2000 census)

39,636; (2007

estimate)

40,564

Jefferson City is the capital of the U.S.

state of Missouri. The city is located on

the Missouri River.

Farmers from the surrounding area sell

crops and livestock in Jefferson City.

Many people in the city work for the

government or in health care or education.

Factories in Jefferson City make

shoes, books, electrical appliances, and

food products.

The city began as a small settlement

called Lohman’s Landing. In 1821 the

settlement was selected as the site for the

capital of Missouri. A son of the famous

American pioneer Daniel Boone laid out

the city in 1822. It was named after

Thomas Jefferson, the third president of

the United States. Jefferson City officially

became the state capital in 1826.

..More to explore

Missouri • Missouri River

Jellyfish

Jellyfish are sea animals with a soft, jellylike

body and no bones. They have tentacles,

or feelers, that they use to sting

their prey. Sometimes they sting swimming

people, too.

Jellyfish are related to corals and sea

anemones. There are about 200 species,

or types, of jellyfish. They are found in

all oceans. Most live at or near the surface

of the water.

A typical jellyfish is shaped like a bell or

an umbrella. Some jellyfish are hardly

large enough to be seen. Others are

more than 6 feet (2 meters) across. Jellyfish

can be transparent (see-through),

white, brown, pink, blue, or maroon.

Some jellyfish have eyes around the edge

of the body. The mouth and stomach are

in the middle of the body.

A jellyfish may have a few or many tentacles.

Thin tentacles run around the

edge of the body. Four or more larger

tentacles hang down from the middle of

the body, below the mouth. The tentacles

are lined with stinging cells that

make poison. The poison can stun small

animals. The tentacles then pull the animals

into the mouth.

Tourists leave the Governor’s Mansion in

Jefferson City, Missouri.

Jellyfish are

not fish. They

are a much

simpler form

of living thing.

BRITANNICA STUDENT ENCYCLOPEDIA Jellyfish 19

Certain jellyfish can be very dangerous

to humans. Even a small sting from the

jellyfish called sea wasps can kill a person

within a few minutes.

#More to explore

Coral • Sea Anemone

Jemison, Mae

Mae Jemison was the first African

American woman to become an astronaut.

She was a part of the crew of the

space shuttle Endeavor, which orbited

Earth for more than a week in 1992.

Jemison was born on October 17, 1956,

in Decatur, Alabama. She was the

youngest of three children. When she

was 3, the family moved to Chicago,

Illinois. Even as a young girl Jemison

was deeply interested in science.

Jemison graduated from high school at

age 16. She then received a scholarship

to attend Stanford University in California.

She graduated from there in 1977

with a degree in chemical engineering.

After Stanford, Jemison attended medical

school at Cornell University in New

York. She received her medical degree in

1981. She worked as a doctor first in

Los Angeles, California, and then with

the Peace Corps inWest Africa.

Then Jemison applied to the National

Aeronautics and Space Administration

(NASA) to become an astronaut. She

was one of only 15 out of 2,000 applicants

accepted by NASA. Jemison

entered NASA’s astronaut program in

1987. In 1992 Jemison flew aboard the

shuttle Endeavor as the science mission

specialist. At the time she was the only

female African American astronaut.

After retiring from NASA in 1993,

Jemison founded her own company, the

Jemison Group. The company created

new technologies, especially to help

developing countries. Jemison also cre-

Jellyfish swim by opening and closing their

bodies like an umbrella.

Mae Jemison works aboard the space

shuttle Endeavor.

20 Jemison, Mae BRITANNICA STUDENT ENCYCLOPEDIA

ated an international science camp for

teenagers.

..More to explore

African Americans • Science • Space

Exploration

Jerusalem

Population

(2006 estimate)

729,100

Jerusalem is an ancient city in the

Middle East. Three major religions—

Judaism, Christianity, and Islam—

regard the city as holy. In modern times

the country of Israel and the Palestinian

Arabs have fought for control of Jerusalem.

Israel claims the city as its capital.

However, the Palestinians have protested

that claim.

Major Holy Sites

The part of Jerusalem called the Old

City has many important religious sites.

Jews consider the Western Wall to be a

holy place of prayer. It is all that

remains of the Second Temple of

Jerusalem, which was destroyed in

ancient times.

Christians consider Jerusalem holy

because of its connections with Jesus.

The Church of the Holy Sepulchre is in

Jerusalem. Christians built it over the

place where they believe Jesus was killed,

buried, and then raised from the dead.

The holiest Muslim site in Jerusalem is a

monument called the Dome of the

Rock. Muslims believe it marks the place

where an angel carried Muhammad, the

founder of Islam, up to heaven.

Economy

Many people in Jerusalem work at jobs

serving the public, such as in

government, health care, or education.

The city is also a center of tourism and

banking. Factories in the city make

electronics, processed foods, and other

products.

History

People have lived in Jerusalem for at

least 5,000 years. In about 1000 BC King

David made Jerusalem the capital of the

Jewish kingdom of Israel. The Jews built

the First Temple of Jerusalem in the

900s BC. Troops from Babylonia

Jews pray at the Western Wall in the Old

City of Jerusalem. Behind the Western Wall

is the Dome of the Rock.

BRITANNICA STUDENT ENCYCLOPEDIA Jerusalem 21

destroyed the temple in 586 BC. They

also forced many Jews to leave Jerusalem.

About 50 years later the Jews

returned and built the Second Temple.

Jesus was killed in Jerusalem in about AD

30. At that time Jerusalem was part of

the Roman Empire. In AD 70 the

Romans destroyed much of the city,

including the Second Temple.

Various Muslim leaders ruled Jerusalem

for most of the 600s to the early 1900s.

Christian soldiers called Crusaders captured

the city a few times during the

1000s to 1200s.

In 1948 the country of Israel was created.

The United Nations was supposed

to rule Jerusalem as an international city.

However, war broke out. During the

fighting the country now called Jordan

captured Jerusalem’s eastern section.

Israel captured Jerusalem’s western section.

Israel took control of the entire city

in 1967.

..More to explore

Christianity • Crusades • Islam • Israel

• Jesus Christ • Judaism • Muhammad

• Palestine

Jesus Christ

The teachings of Jesus, or Jesus Christ,

are the basis of Christianity. Christians

believe that Jesus was the Messiah—a

savior sent to deliver people from sin.

The word Christ comes from Khristos,

the Greek word for Messiah.

Early Life

Nearly everything known about Jesus

comes from the Bible, in the four books

of the New Testament known as the

Gospels. According to the Bible, the

angel Gabriel visited a woman named

Mary and told her she would give birth

to the Son of God. Her son, Jesus, was

born in about 6 BC in Bethlehem, a city

in the Middle Eastern region of Palestine.

Mary and her husband, Joseph,

were from Nazareth, and that is where

Jesus grew up.

Ministry

Jesus began preaching when he was

about 30 years old. He gathered a group

of 12 followers, or disciples, called the

apostles, who helped him spread his

message. Jesus was a Jew, and many of

his teachings grew out of Judaism. He

taught people to forgive others, to live a

good life, and to honor God so as to

A painting shows an artist’s idea

of what Jesus looked like. The

halo around Jesus’ head is a

symbol of holiness.

The Old City

is surrounded

by a stone

wall built in

1538–40.

Newer parts

of Jerusalem

were built

outside the

wall.

22 Jesus Christ BRITANNICA STUDENT ENCYCLOPEDIA

enter God’s kingdom. He often taught

by using parables, or short stories that

illustrated his message. The Gospels also

describe various miracles he performed,

such as raising the dead, turning water

into wine, and healing the sick. Jesus

attracted many followers.

Opposition to His Ministry

Jesus welcomed all types of people, even

those whom Jewish religious leaders

considered to be sinners. Some religious

leaders thought that Jesus’ teaching was

wrong and that it was leading people

astray. Others feared that he might start

a political uprising and that this would

lead to great trouble.

Death and Resurrection

Jesus knew that opposition to him was

growing and that one of his disciples,

Judas Iscariot, was turning against him.

Jesus gathered the apostles together for a

meal, later known as the Last Supper.

He told them that his death was necessary

because it would establish a new

bond between God and humans. Jesus

took bread and wine, blessed them, and

shared them with his disciples. Christians

remember this in a ceremony

known as Holy Communion or the

Lord’s Supper.

Later that night, Judas brought men to

arrest Jesus, and Jesus was sentenced to

death. He was crucified, or nailed to a

cross. He died on the cross and was buried

nearby.

On the third day after that, a group of

women went to Jesus’ tomb and found

the body gone. The Gospels tell that

Jesus then appeared to one of the

women, Mary Magdalene, and to the

disciples. He spent 40 days on Earth

after his Resurrection, or return from

the dead, and then was taken up to

heaven.

The story of Jesus’ Resurrection is central

to Christian belief. His apostles continued

to teach his message after his

death, and as that message spread,

Christianity was born.

..More to explore

Bible • Christianity • Judaism • Palestine

Jewelry and

Gems

Jewelry is any object other than clothes

that is worn to decorate the body. People

use many different materials in making

jewelry. Fine jewelry is made of valuable

A girl wears a necklace made of beads and

shells.

BRITANNICA STUDENT ENCYCLOPEDIA Jewelry and Gems 23

metals, such as gold and silver, and

beautiful stones called gems. Jewelry

that is made of plastic, steel, ceramics,

glass, or other less costly materials is

called costume jewelry. People who still

live as their ancient ancestors did make

jewelry from bone, claws, animal hair,

wood, and shells.

The Importance of Jewelry

People wear jewelry for many reasons.

Kings, queens, and other leaders have

often worn fine jewelry at important

ceremonies and events. Some people

wear jewelry for religious reasons. Many

people wear jewelry to mark an important

life event. For example, many men

and women give each other rings at their

weddings.

Types of Gems

Most gems are hard minerals that are

found naturally in the earth. However,

a few gems come from animals or

plants. Pearls form inside the shells of

oysters, clams, and other animals called

mollusks. Amber is tree sap that has

fossilized, or turned to stone. Jet is a

hard form of brown coal, which is

made from fossilized plants. Coral

comes from the skeletons of sea animals

called corals.

The color of gems ranges from colorless

to pure black. Gems may be transparent

(see-through) or opaque, which means

that light cannot shine through them.

Among the rarest and most valuable

gems are diamonds, rubies, emeralds,

and sapphires. These gems are all transparent

minerals. Diamonds may be yellow,

pink, blue, or black. Rubies are red,

and emeralds are green. Sapphires may

be blue, violet, yellow, green, or almost

black.

Other valuable gems include jade, carnelian,

and lapis lazuli. These gems are

opaque. Jade is usually green, but it can

also be pink, white, or lavender. Carnelian

is red or reddish brown. Lapis lazuli

is blue with gold-colored flecks in it.

The crown of Queen Victoria, who ruled the

United Kingdom from 1837 to 1901, is

filled with diamonds.

Some pearls form naturally inside the shells

of mollusks. Other pearls, called cultured

pearls, form after people stick beads or

other tiny objects inside a mollusk’s shell.

24 Jewelry and Gems BRITANNICA STUDENT ENCYCLOPEDIA

History

People have been making jewelry for

tens of thousands of years. Ancient

peoples made jewelry from teeth and

animal bones. People began making

jewelry from gold more than 4,000 years

ago. In ancient times and in the Middle

Ages people shaped and polished gems

to make them round and shiny. In the

1400s people discovered how to cut

gems to give them many flat surfaces

called facets. Facets make gems sparkle.

In the 1800s people learned how to

make artificial, or fake, gems.

#More to explore

Mineral

Joan of Arc

Joan of Arc is a national heroine of

France. Born a peasant, she became a

military leader while just a teenager.

Joan of Arc was born in Domremy,

France, probably in 1412. At the time

France and England were fighting the

Hundred Years’War. Reims, the city

where French kings traditionally were

crowned, was in enemy hands. As a

teenager Joan claimed that the voices of

saints commanded her to drive the

English out of northern France. Charles

VII, heir to the French throne, could

then be crowned king in Reims.

Joan traveled far to visit Charles at his

castle. Some of Charles’s advisers were

suspicious of her. Church officials

thought she might be a witch. They

asked her many questions. Finally they

advised Charles to use Joan’s services.

Joan inspired the French troops with her

great spirit. In 1429 she led them to

victory over the English in a battle in the

French city of Orleans. The army then

entered Reims. Joan stood beside

Charles VII as he was crowned king.

Joan fought other battles, too. In 1430

she got separated from her soldiers and

was forced to surrender. The English put

her on trial. She was charged with

witchcraft and other crimes against the

church. She had to confess to wrongdoing

or be put to death.

Joan confessed but then changed her

mind. She said that saints had criticized

her for confessing. On May 30, 1431,

she was burned to death at the stake.

She was just 19 years old. Years later a

church court canceled the judgment

Joan of Arc watched as Charles VII was

crowned king of France in 1429.

BRITANNICA STUDENT ENCYCLOPEDIA Joan of Arc 25

against Joan. In 1920 the Roman

Catholic church made Joan a saint.

#More to explore

France • Saint

Johnson, Andrew

Andrew Johnson became president of

the United States in 1865, when Abraham

Lincoln was assassinated. Johnson’s

biggest challenge was the rebuilding of

the Southern states, which had just lost

the American CivilWar.

Early Life

Andrew Johnson was born in Raleigh,

North Carolina, on December 29, 1808.

His father, Jacob Johnson, died when

Andrew was young. His mother, Mary

McDonough Johnson, worked as a spinner

and a weaver.

In 1826 the poor family moved to

Greeneville, Tennessee, where Johnson

opened a tailor shop. At age 18 he married

Eliza McCardle. The couple had

five children.

Political Career

Johnson served as mayor of Greeneville.

In 1835 he entered the Tennessee legislature.

In 1843 he began the first of five

terms in the U.S. House of Representa-

December 29, July 31,

1808 1853 1864 1865 1868 1869 1875

Johnson is born

in Raleigh,

North

Carolina.

Johnson

becomes

governor of

Tennessee.

Johnson is

elected vice

president under

President

Abraham

Lincoln.

Johnson

becomes

president after

Lincoln is killed.

Congress

impeaches

Johnson but

finds him not

guilty.

Johnson retires

from the

presidency.

Johnson dies

in Tennessee.

T I M E L I N E

Andrew Johnson was the 17th president of

the United States.

26 Johnson, Andrew BRITANNICA STUDENT ENCYCLOPEDIA

tives. Afterward he served two terms as

governor of Tennessee. In 1857 he

entered the U.S. Senate.

After Abraham Lincoln became president

in 1860, Johnson was the only

Southern senator who did not resign in

protest. Many people in the South disagreed

with Lincoln over the issue of

slavery. They were afraid that Lincoln

would try to end slavery. This soon led

to the CivilWar. Johnson, however,

sided with the Union, not the Southern

states. Lincoln appointed him military

governor of Tennessee in 1862.

Johnson was a Democrat, but in the

1864 election the Republicans chose

him to run as Lincoln’s vice president.

The party hoped to win the votes of

Democrats who supported the Union.

Lincoln and Johnson won easily.

Presidency

When Lincoln was assassinated on April

14, 1865, Johnson became president.

The CivilWar was over, and Johnson

had to rebuild the Union—a process

called Reconstruction. He spent much

of his term struggling with the Republicans

in Congress.

The Republicans set harsh rules for letting

Southern states back into the

Union. They also wanted to ensure civil

rights for freed slaves. Johnson did not

want to punish the South or give blacks

the right to vote. He vetoed, or rejected,

Congress’s acts. However, Congress

overrode the vetoes, or passed the acts

with a large majority of votes.

Congress also passed a law preventing

the president from firing government

officers. When Johnson fired his secretary

of war, the House of Representatives

voted to impeach Johnson (put

him on trial) for breaking the law.

Johnson was the first U.S. president to

be impeached. The Senate found

Johnson not guilty.

Last Years

Johnson left office in 1869 and returned

to Tennessee. In 1875 he reentered the

U.S. Senate. He died soon afterward, on

July 31, 1875.

#More to explore

American CivilWar • Lincoln, Abraham

• Reconstruction • United States

Johnson, Jack

Jack Johnson was the first African

American to win the heavyweight boxing

championship of the world. He was

famous during a time of great uneasiness

Jack Johnson

BRITANNICA STUDENT ENCYCLOPEDIA Johnson, Jack 27

between blacks and whites. Many white

people hated Johnson for being successful.

They criticized him unfairly.

John Arthur (Jack) Johnson was born in

Galveston, Texas, on March 31, 1878.

He dropped out of school after the fifth

grade. He began boxing professionally in

1897.

Johnson won the heavyweight title in

1908. He defeated Tommy Burns in a

fight in Australia. Johnson lost the title

in 1915, when JessWillard knocked him

out after 26 rounds.

Johnson’s professional career lasted until

1928. In that time he fought more than

100 matches. He was knocked out only

three times.

In 1912 Johnson broke a law by crossing

a state line with his bride before they

were married. He was sentenced to a

year in prison. To avoid jail, he fled to

Canada disguised as a member of a

black baseball team. Johnson returned to

serve his sentence in 1920.

After his release from prison, Johnson

boxed sometimes. He also performed in

carnival acts. He eventually owned his

own supper club.

On June 10, 1946, Johnson was killed

in an automobile accident in Raleigh,

North Carolina. He was inducted into

the Boxing Hall of Fame in 1954.

#More to explore

Boxing

Johnson,

Lyndon B.

Lyndon B. Johnson became president of

the United States in 1963, when John F.

Kennedy was assassinated. During his

presidency Johnson introduced important

social laws, including a civil rights

bill. He is also remembered for expanding

U.S. involvement in the Vietnam

War.

Early Life

Lyndon Baines Johnson was born on

August 27, 1908, on a farm near

Stonewall, Texas. He was the oldest of

five children. His father, Sam Ealy

Johnson, Jr., was a businessman and a

member of the Texas legislature. His

mother, Rebekah Baines Johnson, was a

daughter of a state legislator.

Lyndon B. Johnson was the 36th president

of the United States.

Jack Johnson

continued to

box in nonchampionship

matches until

he was about

67 years old.

28 Johnson, Lyndon B. BRITANNICA STUDENT ENCYCLOPEDIA

After graduating from college in 1930,

Johnson taught at a Houston high

school. The next year he went toWashington,

D.C., as an assistant to a Democratic

congressman. In 1934 Johnson

married Claudia Alta Taylor, known as

Lady Bird. The couple had two daughters.

Political and Military Career

In 1937 Johnson entered the U.S.

House of Representatives. He joined the

U.S. Navy in 1941. After fighting in

WorldWar II, Johnson was elected to

the U.S. Senate in 1948. During his 12

years there he became the leader of the

Democratic senators. He had a heart

attack in 1955 but soon went back to

work.

Presidency

In 1960 Johnson ran for vice president

under the Democrat John F. Kennedy.

The Republican presidential candidate

was Richard M. Nixon. Johnson’s influence

in the South helped the Democrats

to win. On November 22, 1963,

Kennedy was assassinated in Dallas,

Texas. Johnson was sworn in as president

that afternoon.

Johnson helped to calm the mourning

nation. He urged Congress to pass laws

that Kennedy had proposed. In July

1964 Johnson signed the historic Civil

Rights Act. The act’s goal was to end

racial discrimination.

In the presidential election of 1964

Johnson defeated Republican Barry

Goldwater. In his second term Johnson

continued his program of reforms called

the Great Society. He signed laws to

fight poverty and to improve education,

medical care for the aged, and housing.

In 1965 Congress passed the Voting

Rights Act, which outlawed the many

ways that people had tried to prevent

African Americans from voting.

Despite those successes, many people

criticized Johnson for sending hundreds

August 27, November 22, January 22,

1908 1960 1963 1964 1965 1969 1973

Johnson

is born near

Stonewall,

Texas.

Johnson is

elected vice

president under

President John

F. Kennedy.

Kennedy is

killed; Johnson

becomes

president.

Johnson

signs the

Civil Rights

Act.

Johnson begins

sending

thousands of

troops to

Vietnam.

Johnson retires.

Johnson dies in

San Antonio,

Texas.

T I M E L I N E

BRITANNICA STUDENT ENCYCLOPEDIA Johnson, Lyndon B. 29

of thousands of U.S. troops to fight in

the VietnamWar. Many also complained

that racism and poverty were

still huge problems. Beginning in the

mid-1960s, several cities experienced

severe rioting. In 1968 Johnson decided

not to seek reelection.

Last Days

In 1969 Johnson retired to his ranch in

Texas. On January 22, 1973, just a few

days before the end of the VietnamWar,

Johnson died of a heart attack in San

Antonio.

#More to explore

Civil Rights • Kennedy, John F. • United

States • VietnamWar

Johnson, Magic

Magic Johnson was a basketball player

who led the Los Angeles Lakers to five

National Basketball Association (NBA)

championships. He was known especially

for his expert passing and for his

leadership on the court.

Early Life

Earvin Johnson, Jr., was born in Lansing,

Michigan, on August 14, 1959. As

a young boy he practiced basketball for

many hours at the playground. In high

school he earned the nickname Magic

for his skills in handling the ball. In

1977 he helped his high school team

win the state championship. Later he

played for Michigan State University. He

led the Michigan State Spartans to the

college championship in 1979.

Professional Career

That same year Johnson joined the Los

Angeles Lakers. He was the team’s point

guard from 1979 to 1991. He was

named the NBA’s most valuable player

six times. He also earned a gold medal as

a player on the 1992 U.S. Olympic basketball

team.

In 1991 Johnson found out that he had

HIV. HIV is the virus that causes the

disease AIDS. He left the NBA, but he

returned for the 1995–96 season. In

2002 he was named to the Basketball

Hall of Fame.

Beyond Basketball

In 1991 Johnson started the Magic

Johnson Foundation. The foundation

gives money to HIV/AIDS clinics in

U.S. cities. It also builds computer centers

and provides money for city chil-

Magic Johnson of the Los Angeles

Lakers makes a hook shot

during the 1992 NBA All-Star

Game.

People often

called Lyndon

Johnson by his

initials: LBJ.

His Texas

home was

called the LBJ

Ranch.

30 Johnson, Magic BRITANNICA STUDENT ENCYCLOPEDIA

dren to go to college. Johnson became

part owner of the Lakers in 1994.

#More to explore

Basketball

Jolliet, Louis

Louis Jolliet was a French-Canadian

explorer and mapmaker. He and Father

Jacques Marquette were the first white

men to explore the upper Mississippi

River in North America.

Louis Jolliet was born in about September

1645 in Beaupre, Canada. He went

to France to study science. After returning

to Canada, he made his living trading

furs near the Great Lakes.

In 1672 the French governor in North

America asked Jolliet and Marquette to

explore the great river west of the Great

Lakes—the Mississippi. They set out

with five other men on May 17, 1673,

in two canoes made of bark. They left

from Saint Ignace in what is now the

Upper Peninsula of Michigan. From

Lake Michigan they entered the Fox

River at Green Bay. They portaged, or

carried their canoes and supplies, from

the Fox to theWisconsin River. Then

they continued to the Mississippi.

In July Jolliet and Marquette reached the

mouth of the Arkansas River in what is

now Arkansas. The Quapaw people

there told them that the river flowed

into the Gulf of Mexico. The explorers

had hoped that the river would take

them all the way to the Pacific Ocean.

Jolliet and Marquette turned back and

returned by way of the Illinois River.

They became the first white men to visit

what is now Illinois.

Jolliet later explored Hudson Bay and

some Canadian rivers. He died in the

summer of 1700 near Quebec, Canada.

#More to explore

Marquette, Jacques • Mississippi River

Jones, John Paul

John Paul Jones was a hero of the colonial

navy during the American Revolution.

He defeated a British ship in one

of the most famous sea battles in history.

Early Life

John Paul Jones was originally named

John Paul. He was born on July 6, 1747,

near Kirkcudbright, Scotland. At about

age 12, he began working on ships that

carried goods for trade.

Jolliet took

notes on and

drew maps of

the Mississippi

River. All were

lost when his

canoe overturned.

Louis Jolliet and Father Jacques Marquette

sometimes had to portage, or carry their

canoes, while exploring the Mississippi River.

BRITANNICA STUDENT ENCYCLOPEDIA Jones, John Paul 31

Career

By 1766 Paul had sailed to places as far

away as North America and Jamaica. In

1768 a fever spread through the ship he

was on. When the ship’s commanders

died, Paul took charge and brought the

ship safely into port. The ship’s owners

quickly appointed him captain of the

ship.

In 1772 Paul bought a ship in theWest

Indies. The following year he killed a

sailor who challenged his authority. To

escape trial Paul fled to North America,

where he changed his name to John Paul

Jones.

When the American Revolution began,

the leaders of the American colonies

made Jones a senior lieutenant in the

Continental Navy. During the war Jones

and his crew destroyed and captured

many enemy ships.

In 1779 Jones fought his most famous

battle—a fierce clash with the British

ship Serapis. The battle took place off

the east coast of England. The Serapis

was larger and better-armed than Jones’s

ship, the Bonhomme Richard. But when

the British captain called to Jones to

surrender, Jones yelled back, “I have not

yet begun to fight!” After a long battle,

the Serapis surrendered. However, the

Bonhomme Richard was badly damaged,

and it sank soon afterward. In 1787

Jones received a Congressional gold

medal.

Retirement and Death

After serving briefly in Russia’s navy,

Jones retired to Paris, France. He died

in that city on July 18, 1792. More

than 100 years later, U.S. warships

carried Jones’s body back to the United

States. He was reburied in a tomb at

the U.S. Naval Academy in Annapolis,

Maryland. His grave was made a

national shrine.

#More to explore

American Revolution • Navy

John Paul Jones

John Paul Jones’s ship the Bonhomme Richard

is pictured in battle with the British ship

Serapis on September 23, 1779.

32 Jones, John Paul BRITANNICA STUDENT ENCYCLOPEDIA

Jordan

The Middle Eastern nation of Jordan is

a small state with an ancient history. The

country’s full name is the Hashimite

Kingdom of Jordan. The capital and

largest city is Amman.

Geography

Jordan borders Syria, Iraq, Saudi Arabia,

Israel, and the Palestinian territory of

theWest Bank. The Jordan River flows

along Jordan’s western border to the

Dead Sea. Jordan has a short coastline

on the Gulf of Aqaba, an arm of the Red

Sea.

A fertile valley runs along the Jordan

River. East of the valley are rocky highlands.

Beyond the highlands is a desert,

which covers more than 80 percent of

Jordan’s land. The country is generally

dry, with hot summers and cool winters.

Plants and Animals

Banana, date palm, and citrus trees grow

in the valley. The highlands have small

trees, sagebrush, and grasslands. Few

plants grow in the desert.

The animals found in Jordan include

wild boars, hares, jackals, foxes, wildcats,

hyenas, wolves, mongooses, and gazelles.

Birds include golden eagles, vultures,

pigeons, and partridges.

People

Most of Jordan’s people are Arabs.

About a third of the Arabs are Palestinians

from Israel and theWest Bank.

Most of the people practice Islam. There

is also a small number of Christians.

Arabic is the main language, but many

people also speak English. About three

fourths of the people live in cities.

Economy

Unlike some other countries in the

Middle East, Jordan does not have much

petroleum (oil) or other natural

resources. The economy is based on services,

including banking, government

work, and tourism. Many tourists come

to see the biblical cities near the Jordan

River.

Manufacturing and mining are also

important. Factories produce chemicals,

cement, clothing, and food products.

The country refines petroleum and

mines potash and phosphates, which are

used to make fertilizers. Limited farming

produces tomatoes, olives, vegetables,

and citrus fruits.

BRITANNICA STUDENT ENCYCLOPEDIA Jordan 33

History

People have lived in Jordan for more

than 200,000 years. Ancient Jordan was

part of the area known as Palestine.

Early kingdoms—including Ammon,

Moab, and Edom—ruled from the

1200s BC.

Assyrians, Babylonians, Persians, Seleucids,

and the Roman Empire later controlled

the region. In the AD 600s Arab

invaders brought Islam to the area. The

Ottoman Empire ruled from the 1500s

until 1918.

In 1920 Great Britain took control of

what is now Jordan. The territory, then

called Transjordan, gained full independence

in 1946. Abdullah of the Hashimites,

a powerful Arab family, became

king.

Jordan soon became involved in conflicts

with its neighbors. In 1948 the

country of Israel was created out of part

of Palestine. Jordan joined other Arab

nations in a war against Israel. A large

number of Palestinians were forced out

of Palestine and into Jordan.

In 1967 Jordan fought another war with

Israel. Jordan lost theWest Bank and the

eastern part of Jerusalem to Israel. The

losses increased the number of Palestinians

who moved to Jordan.

Jordan began moving toward peace and

stability in the 1980s. In 1988 Jordan

gave up its claims to theWest Bank. In

1994 Jordan signed a peace treaty with

Israel. In the early 21st century Jordan

continued to work for peace in the

Middle East.

..More to explore

Amman • Jordan River • Middle East

• Palestine

A large tomb, called the Treasury, was cut

into the sandstone cliffs in Petra, Jordan,

thousands of years ago.

Jordan’s Queen Rania visits with

local children.

Facts About

JORDAN

Population

(2008 estimate)

5,844,000

Area

34,495 sq mi

(89,342 sq km)

Capital

Amman

Form of

government

Constitutional

monarchy

Major cities

Amman,

Az-Zarqa#, Irbid,

Ar-Rusayfah,

Wadi Essier,

Al-!Aqabah

34 Jordan BRITANNICA STUDENT ENCYCLOPEDIA

Jordan, Michael

Michael Jordan was one of the best basketball

players of all time. He led the

Chicago Bulls to six National Basketball

Association (NBA) championships. He

was called Air Jordan because of how he

soared toward the basket for spectacular

slam dunks.

Early Life

Michael Jeffrey Jordan was born on February

17, 1963, in Brooklyn, New York.

He grew up inWilmington, North

Carolina. In 1981 he entered the University

of North Carolina at Chapel

Hill. As a freshman he scored the winning

basket in the 1982 college championship

game. Jordan was named college

basketball player of the year in 1983 and

1984. He left North Carolina after his

junior year.

Olympics

Jordan led the U.S. basketball team to a

gold medal at the 1984 Summer Olympic

games in Los Angeles, California. In

1992 he earned another gold medal at

the Summer Olympics in Barcelona,

Spain. He and the other U.S. players

were called the Dream Team.

Success with the Bulls

Jordan first played for the Bulls in the

1984–85 season. In 1985 he was named

Rookie of the Year.With his help the

Bulls won the NBA championship three

years in a row, from 1991 to 1993. Jordan

was named most valuable player

(MVP) of each championship series.

Jordan retired from basketball in 1993

to play professional baseball. He

returned to the Bulls in March 1995.

Again he led the team to three NBA

championships in a row, from 1996 to

1998. Jordan was the MVP of each

championship series.

WashingtonWizards and

Retirement

Jordan retired from basketball again in

1999, but in 2001 he returned to the

NBA. He played two seasons for the

WashingtonWizards.

Jordan retired for a third and final time

in 2003. His career totals included

32,292 points, 2,514 steals, 5 MVP

awards, and 10 scoring titles. He played

in 13 NBA All-Star games.

#More to explore

Basketball

Jordan helped

the Bulls win

72 games in

the 1995–96

season.

Michael Jordan of the Chicago

Bulls tries to slam-dunk a ball

during an NBA All-Stars competition

in 1987.

BRITANNICA STUDENT ENCYCLOPEDIA Jordan, Michael 35

Jordan River

The Jordan River, in the Middle East, is

the lowest river in the world. It ends in

the Dead Sea, at a depth of 1,312 feet

(400 meters) below sea level. The river is

important to Christians, Jews, and Muslims

because of its location in an area

that is holy to all three.

The Jordan River is more than 223

miles (360 kilometers) long. It starts on

the slopes of Mount Hermon, on the

border of Lebanon and Syria. It flows

southward through northern Israel to

the Sea of Galilee. There the river drops

sharply, to 686 feet (209 meters) below

sea level.

South of the Sea of Galilee, the Jordan

divides Israel and the Israeli-occupied

West Bank on the west from Jordan on

the east. It flows through a deep, narrow

valley with steep sides. Finally it empties

into the Dead Sea.

Little rain falls in the Jordan River valley.

This makes the river’s water very

important to farmers in the region. Irrigation

systems pump water from the

Jordan River to farm fields in Jordan

and Israel.

#More to explore

Dead Sea • Irrigation • River

Judaism

The religion of the Jewish people is

Judaism. Judaism has more than 14 million

followers throughout the world,

more than a third of whom live in the

United States. Many other Jews live in

Israel, a country at the eastern edge of

the Mediterranean Sea.

Beliefs

Like Christianity and Islam, Judaism

teaches that there is only one God and

that God created the world. God

The distance between the

beginning and end of the

Jordan River is less than 124

miles (200 kilometers). Because

the river winds a lot, however,

its length is more than 223

miles (360 kilometers).

36 Jordan River BRITANNICA STUDENT ENCYCLOPEDIA

expressed what he expects of people in

the Ten Commandments and other

laws.

Jews believe that God chose them to

have a special relationship with him.

They must devote themselves to God

and love one another because God

selected them to bring knowledge of

him to the rest of the world. They

believe that, in return, God has promised

to make the Jews (Israel) a great

nation that will eventually draw other

nations together in a worldwide community

of justice and peace.

The sacred book of Judaism is the

Hebrew Bible. Particularly important to

Judaism are the first five books, which

are known as the Torah. These writings

explain and interpret God’s laws. The

Talmud is a collection of traditional

Jewish laws along with stories and comments

about those laws.

Practices

In Judaism the lives of individuals are

closely connected to the larger community.

The Jewish house of worship, called

a synagogue, also serves as a community

gathering place. Its leader is known as a

rabbi. At the heart of synagogue worship

is the public reading of the Torah.

An important time during each week is

the Sabbath. Jews observe this period of

Jewish children study the teachings of their

religion. Jews sometimes wear skullcaps

called yarmulkes.

Some Important Jewish Holidays

Holiday Meaning Date

Passover remembrance of the early Jews’ escape March/April

from slavery in Egypt

Purim celebration of the survival of early Jews usually in March

living under the rule of the Persians

Shavuot remembrance of the day that God gave 50 days after Passover

the Ten Commandments to Moses

Rosh Hashana Jewish new year September/October

Yom Kippur day of asking forgiveness for sins eight days after Rosh Hashana

Sukkot festival of thanksgiving September/October

Hanukkah celebration of a miracle at the Second usually in December

Temple of Jerusalem

Note: Actual dates depend on the Jewish calendar.

BRITANNICA STUDENT ENCYCLOPEDIA Judaism 37

holiness and rest from sunset on Friday

to nightfall on Saturday.

Divisions

Judaism has three main divisions. The

most traditional is Orthodox. Orthodox

Jews believe that Judaism today should

be practiced just as it was in ancient

times. In the 1800s two groups broke

away. They believed that Judaism should

adapt to new situations. Reform Jews

made the most changes. They do not

participate in all the ceremonies that are

observed by Orthodox Jews. Conservative

Jews uphold many ancient traditions

but have made some changes in

their religious practices.

History

Abraham

Judaism is thought to trace back to

about 2000 BC. A man named Abraham

is considered the founder. According to

the Torah, God told Abraham to leave

his home in Mesopotamia (now Iraq)

and take his people to Canaan (Palestine).

God promised that if Abraham

obeyed, he and his offspring would

become a great nation in this new land.

This is the first covenant, or agreement,

that God made with the Jews.

Moses

Long after the days of Abraham, a famine

caused the Israelites to move to

Egypt. They were later turned into slaves

there. After more than 400 years, the

Jews were freed from slavery under the

leadership of Moses in about the 1200s

BC. As instructed by God, Moses led the

Israelites back to Canaan. Jews believe

that God gave Moses the Ten Commandments

and promised that if the

Israelites followed these rules, he would

look after them.

Rise and Fall of Israel

Over the next several centuries, Israel

became a fairly powerful nation in the

Middle East, particularly under its first

three kings—Saul, David, and Solomon.

David conquered Jerusalem and established

it as the capital city. His son,

Solomon, built the first great Temple of

Jerusalem in the 900s BC.

In the 700s BC the Assyrian Empire captured

northern Israel. Early in the 500s

BC, Babylonians conquered southern

Israel, destroyed the Temple, and sent

some of the Jews away into slavery. This

event marked the beginning of the

Diaspora, which means “scattering.”

From then on, the Jewish people were

no longer together in one place.

A Jewish service takes place inside a synagogue.

38 Judaism BRITANNICA STUDENT ENCYCLOPEDIA

Some Jews later returned to their homeland

and rebuilt the Temple. But the

region remained under the control of

one foreign power after another. The

Roman Empire took control of the area

in the 1st century BC. Jewish revolts

against the Roman Empire in the 1st

and 2nd centuries AD were unsuccessful.

During this period the Romans

destroyed the second Temple. Many

Jewish people moved away and eventually

settled in other countries.

Establishment of Modern Israel

In the late 1800s a movement called

Zionism began in Europe. It was named

for Mount Zion, a hill in Jerusalem. The

Zionists wanted to create a new Jewish

country in Palestine. In the early 1900s

many Zionists moved to Palestine to

escape harsh conditions in Europe. By

1935 the Jewish population in Palestine

was about 300,000.

This Jewish immigration increased

greatly when Adolf Hitler came to

power in Germany in the early 1930s.

Hitler and his Nazi Party hated the Jews.

First the Nazis made life hard for Jews,

and later they decided to kill them. This

crime became known as the Holocaust.

The Holocaust ended with the defeat of

Germany inWorldWar II in 1945.

Three years later the modern country of

Israel was founded as a homeland for the

Jews.

..More to explore

Abraham • Bible • Holocaust • Israel

• Jerusalem • Moses • Palestine

• Synagogue • Talmud • Torah

Juneau

Population

(2000 census)

30,711; (2007

estimate)

30,690

Juneau is the capital of the U.S. state of

Alaska. It has the largest area of any U.S.

city. The city covers more than 3,000

square miles (8,000 square kilometers).

Juneau lies on the Gastineau Channel, a

narrow passage of the Pacific Ocean.

The city has no road connections with

most of the rest of Alaska. It must be

reached by air or water.

Many people in Juneau work for the

government. Tourism, fishing, forestry,

and mining are also important to the

city’s economy.

The Juneau area was once a fishing

camp of the Tlingit Indians. In 1880

gold was discovered there. Gold miners

Juneau, Alaska, lies at the foot of Mount

Roberts and Mount Juneau.

BRITANNICA STUDENT ENCYCLOPEDIA Juneau 39

then founded Juneau. For many years

the city was the mining center of Alaska.

Juneau’s gold mine closed in 1944.

Juneau became the capital of Alaska in

1900. In 1959 Alaska became a U.S.

state. Juneau was then the state capital.

#More to explore

Alaska

Juniper

Junipers are evergreen trees and shrubs

with fragrant wood and flavorful berries.

They belong to the cypress family. Some

junipers are called cedars, but they are

not true cedars. True cedars belong to

the pine family.

Junipers are found throughout the

northern parts of the world. They grow

well in shallow, rocky soil. The roots are

often aboveground, and they can curl

around boulders and other objects.

Junipers can grow as a low, spreading

shrub or as an upright tree. Some trees

are as tall as 60 feet (18 meters). The

bark is brownish red or gray. The leaves

are flat and look like needles. They can

be bright green, golden, silvery, or bluish

green. Juniper berries can be white, pale

green, blue, purple, or black.

Junipers grow very slowly and can live a

long time. Some junipers growing in the

western United States are estimated to

be more than 2,000 years old.

Juniper wood is used to make fence

posts, pencils, and storage chests. The

berries are used to flavor meats, sauces,

and drinks. Oil from junipers is used in

perfumes and soaps.

#More to explore

Cedar • Cypress • Tree

Juno

#see Hera.

Jupiter

Jupiter is one of the planets that orbit,

or travel around, the sun in the solar

system. It is the largest planet in the

solar system. In fact, it is bigger than all

the other planets put together. Jupiter is

the fifth planet from the sun. It travels

around the sun at an average distance of

about 484 million miles (780 million

kilometers).

Physical Features

Jupiter is so huge that it could contain

more than 1,000 Earths. Its diameter, or

distance through its center, is about

89,000 miles (143,000 kilometers).

Juniper berries are used to flavor foods and

drinks.

40 Juniper BRITANNICA STUDENT ENCYCLOPEDIA

Jupiter is a kind of planet called a gas

giant. It consists almost entirely of gases,

mainly hydrogen and helium. The

planet has no solid surface.

Jupiter’s clouds appear in colored spots

and bright and dark stripes. These markings

show the planet’s weather patterns.

One of the spots is a huge storm called

the Great Red Spot. The storm is more

than twice as wide as Earth. It has lasted

hundreds of years.

Deep inside Jupiter is an area of hot,

thick liquid. The planet’s center may

reach temperatures of 45,000° F

(25,000° C).

A system of thin rings surrounds Jupiter.

The rings consist of tiny rocks and dust.

They are much smaller and dimmer

than the planet Saturn’s rings.

Orbit and Spin

Like all planets, Jupiter has two types of

motion: orbit and spin. Jupiter orbits, or

travels around, the sun very slowly. It

takes about 12 Earth years to complete

one orbit. In other words, a year on

Jupiter lasts about 12 Earth years.

Jupiter also spins rapidly about its center.

The planet takes less than 10 hours

to complete one rotation. That is how

long a day lasts on Jupiter.

Moons

More than 60 moons orbit Jupiter. Most

of them are very small. However, Jupiter

has four very large moons: Io, Europa,

Callisto, and Ganymede. Ganymede is

larger than the planet Mercury.

Observation and Exploration

People have observed Jupiter from Earth

since ancient times. Scientists sent the

first unmanned spacecraft to the planet

in the 1970s. The spacecraft, called Pioneer

10 and 11 and Voyager 1 and 2,

flew by the planet and collected information

about it.

Later the unmanned U.S. Galileo spacecraft

orbited Jupiter. In 1995 it dropped

an object called a probe toward the

planet. The probe sailed through the

upper layers of Jupiter’s gases and measured

their properties. It was the first

man-made object to make contact with

a gas giant.

#More to explore

Planets • Solar System • Space

Exploration

Jupiter, god

#see Zeus.

Though Jupiter appears solid, it is made up

mostly of gases.

BRITANNICA STUDENT ENCYCLOPEDIA Jupiter, god 41

The famous Mexican artist Frida

Kahlo was seriously injured in

a bus crash when she was 18.

(See Kahlo, Frida.)

Some kangaroos stand 6 feet

(1.8 meters) tall.

(See Kangaroo.)

U.S. president John F. Kennedy

wrote a book called Profiles in

Courage.

(See Kennedy, John F.)

People flew the first kites about

3,000 years ago.

(See Kite.)

The Koran is the holy book of

Islam.

(See Koran.)

The name of the African

American holiday Kwanzaa

comes from the African language

Swahili. It means “first

fruits.”

(See Kwanzaa.)

Kk

Kabul

Population

(2006 estimate)

2,536,300

Kabul is the capital of Afghanistan, a

country in central Asia. It is Afghanistan’s

largest city and center of economy.

The city’s economy, however, was hurt

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