homework encyclopedia

FIND OUT MORE. Electromagnetism 186 • Energy 166 • Human Impact 64 • Machines 196–197 • Rockets 28 • Transport 200–201 Science a ...

200 Science and Technology Many people live in one place, but work in another. At local supermarkets, people buy products from o ...

FIND OUT MORE. Engines 198–199 Congestion occurs when too many vehicles use the same route at the same time, and traffic slows o ...

202 Science and Technology From houses and skyscrapers to bridges and highways, our environment is constructed from many differe ...

FIND OUT MORE. Architecture 328–329 • Computers 190 Science and Technology^203 An engineer applies the principles of science to ...

204 Science and Technology Industry is a general term meaning the businesses and organizations that provide the goods and servic ...

FIND OUT MORE. Changing Materials 171 • Materials 170 • Robots 194 Science and Technology^205 From ankle socks to aircraft, almo ...

206 Science and Technology Crude oil from oil fields around the world is shipped to refineries. The thick, black crude is not a ...

FIND OUT MORE. Atoms 157 • Cells 73 • Chemistry 162 • Farming 66 Science and Technology^207 Plants need minerals from the soil t ...

FIND OUT MORE. Digestion 144–145 • Micro-organisms 85 The use of microbes (micro- organisms) to produce and process materials is ...

FIND OUT MORE. Cells 73 • Genetic Engineering 210–211 • Reproduction 148 209 HOW WILL THE HUMAN GENOME BE USED? Scientists are u ...

210 Science and Technology Genetic engineering is the manipulation of genes of living things. Scientists can now insert genes fr ...

FIND OUT MORE. Cells 73 • Farming 66 • Genetics 209 • Growth 149 • Nervous System 138 • Reproduction 148 Science and Technology^ ...

...

PHYSICAL WORLD 214 POLITICAL WORLD 216 POPULATION 218 MAPPING 220 NORTH AMERICA 222 CANADA, ALASKA, AND GREENLAND 224 EASTERN US ...

Mi ssi ssi ppi^ Pur us^ Amazon Ori noco St.^ L awren ce^ Aleutian^ Tre nch^ Brooks^ Range Great Bear Lake Great Slave Lake Lake ...

Danube Yellow (^) R ive r Yangtze Congo Amu r Lena Mek on g (^) Vol ga Ob’ Zambezi Nig er Ni le^ Orange (^) Gan ges Dar ling^ In ...

KIRIBATI SAMOA TONGA CANADA UNITED STATES OF AMERICA MEXICO NICARAGUA GUATEMALA EL SALVADOR COSTA RICA PANAMA HONDURAS JAMAICA C ...

CAPE VERDE GUINEA SENEGAL GUINEA- BISSAU GAMBIA SIERRA LEONE LIBERIA BENIN TOGO BURKINA GHANA FASO EQUATORIAL GUINEA WESTERN SAH ...

Arctic Circle Tropic of Cancer Equator Tropic of Capricorn Antarctic Circle Great Lakes Lake Titicaca S O U T H PACIFIC OCEAN AT ...