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1
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Breaking down of rocks and transportation of this material.
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5
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Action where the force of moving water erodes the river bed and bank.
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6
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Rock formed when magma cooled down and solidified.
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7
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A stream or river which joins a larger river.
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8
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The crust of the earth broken into a number of separate sections.
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9
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Type of sedimentary rock.
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11
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Feature of a youthful river
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14
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A volcano that has not erupted in recorded history.
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15
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Scale used to measure the force of an earthquake.
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