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the short-term changes in the air for a given place and time |
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a region's average weather conditions over a long period |
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winds that blow in the same direction over large areas of land |
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large streams of surface seawater |
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the place where two air masses of different temperatures or moisture content meet |
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seasonal winds that bring either dry or moist air |
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areas of tall grasses and scattered trees and shrubs |
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semidry grasslands or prairies |
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permanently frozen layers of soil |
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a group of plants and animals that depend on each other for survival and the environment in which they live |
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the place where a plant or animal lives |
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decayed plant or animal matter |
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the spread of desertlike conditions |
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any material in nature that people use and value |
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resources Earth naturally replaces |
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resources that cannot be replaced |
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planting trees to replace lost forestland |
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nonrenewable resources that formed from the remains of ancient plants and animals |
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production of electricity from waterpower |
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