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9 Cards in this Set
- Front
- Back
source of river
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place where a river begins
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volcano
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opening in the Earth, often raised, through which lava, rock, ashes, and gases are forced out
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slope
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side of a hill or mountain
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timberline
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line on a mountain above which it is too cold for trees to grow
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swamp
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area of low, wet land with trees
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strait
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narrow channel of water connecting tow larger bodies of water
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tributary
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stream or river that empties into a larger river
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waterfall
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steep drop from a high place to a lower place in a stream or river
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valley
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low land between hills and mountains
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