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18 Cards in this Set

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plateau
a large mostly flat area that rises above the surrounding land; at least one side has steep slope
elevation
the height of land above sea level
escarpment
a steep cliff about 100 stories high
silt
bits of rock and dirt on river bottoms
fertile
containing substances that plants need in order to grow well
tributary
a river or stream that flows into a larger river
irrigate
to supply dry lang with water by using ditches or canals
oasis
a fertile place in a desert where there is water and vegetation
savanna
region of tall grasses
nomad
a person who moves around to make a living (herds animals, trades, hunts, gathers food)
colonize
to settle an area and take over or create a government
life expectancy
the number of years that a person is expected, on average, to live
ethnic group
a group of people who share the same ancestors, culture, language, or religion
civilization
a societywith cities, a central gov., social classes, and usually, writing, art, and architecture
surplus
more than is needed
commercial farming
farming done by companies; large farms that use technology; raise things to sell
migrate
to move from one place to another
literacy
the ability to read and write