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Paleolithic

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Old part of the Stone Age (750,000 BCE – 10,000 BCE) when people primarily used stone tools.

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Nomads

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People who move from place to place carrying their daily needs.

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Neolithic

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New part of the Stone Age (10,000 BCE – 5,000 BCE), when people mainly farmed and used metal.

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Domesticate

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Train animals to be useful for people.

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Agriculture

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The raising of crops; farming.

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Crop Surplus

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An extra supply of food.

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Specialization

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To focus on a specific kind of job, such as pottery making or metal shaping.

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Hunter-gatherer

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A person or group that does not farm, but hunts and finds food every day.

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Barter

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Type of trade involving the exchange of goods or services.

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Civilization

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A complex society in which a large number of people live.