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7 Cards in this Set
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- Back
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Radio Carbon Dating
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method of determining how old biological objects are by measuring the amount of radioactivity left in a special type of carbon
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Nomads
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a person who moves from place to place, usually in search of food
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Agricultural Revolution
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period when early Americans learned how to plant and raise crops
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Civilization
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a highly organized society marked by knowledge of trade, government, the arts, and science and, often, written language
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Savannah
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a rolling grassland
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Crusades
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an armed struggle to regain the Holy land (Jerusalem)
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Feudalism
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a political system in which kings would give nobles estates in exchange for loyalty and military support
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