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| physical features of the earth's surface; hills, mountains, plains, volcanoes, and prairies are all landforms |
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| an area of high, flat land rising above the nearby land on at least one side |
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| a low-lying area surrounded by higher land |
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| useful things found in nature; includes water, trees, coal, natural gas, oil, metals, and salt |
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| an area that shares common characteristics |
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| people who study the earth and its features |
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| different, varied, coming from different backgrounds |
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| a person who comes to a new place or country to live |
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| language, beliefs, customs, and tools of a group of people; includes religion, clothing, and food |
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| surroundings; includes physical conditions and climate |
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method used to transport water to land; permits farming in areas without enough natural moisture and rain to farm otherwise
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| a lake where water is stored for use |
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Located on the Colorado River, along the border between Arizona and Nevada
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Hoover Dam with Lake Mead behind it. Hoover Dam is in Black Canyon on the Colorado River, about 30 miles southeast of Las Vegas. |
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| Regions of the United States |
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1900
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2000
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