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| large land masses; there are 7 continents on Earth; Africa, Antarctica, Asia, Australia, Europe, North America, and South America |
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| the average weather of a place over several years |
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| scientists who study old bones and objects to learn about past civilizations. |
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| A period of time when early humans made tools and weapons out of stone. The Stone Age ended about 3500 BC |
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| groups of people that live and hunt together in order to have a better chance at survival. |
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| People that do not have a permanent home and move when necessary to find food. |
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| A very cold period of time during which ice covers much of the earth and that can last many thousands of years. |
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| to tame wild animals for human use |
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| large communities that have a written language and a government |
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