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16 Cards in this Set

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glacier

thick sheet of ice that covered Earth's surface during the Ice Age

migrate

To move from one area to another

theory

one possible explanation for something

artifact

object made by people in the past

archeologist

scientist who studies the artifacts of people who lived long ago and draws conclusions from them

ceremony

activity done for a special purpose

mesa

high, flat, landform that rises steeply from the land around it

drought

long period without rain

civilization

culture with organized systems of government, religion, and learning

surplus

more than is needed

specialize

focus on one particular product, activity, or job

slavery

practice of owning people and forcing them to work

tribute

payment a ruler demands from people he or she rules

empire

large group of lands and peoples ruled by one leader

pyramid

building with three or more sides shaped like triangles that slant toward a point at the top

Ice Age

a long period of extreme cold