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Definition
| the daily rising and falling of the ocean and the waters connected to them |
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Definition
| the moving of people or goods |
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Term
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Definition
| the number of people living in a particular |
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Term
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Definition
| a large, high, almost level piece of land |
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Definition
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Term
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Definition
| a line of mountains or hills |
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Term
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Definition
| tunneling into the earth and removing coal |
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Term
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Definition
| stripping off the earth and rock that lies above the coal |
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Term
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Definition
| raising your own food and making the things you need |
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Term
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Definition
| trade without using money |
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