The true statements about the cycle of weathering, erosion, and deposition are:
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Erosion occurs even when mountains are forming. - This is true, as erosion can take place alongside the uplift of mountains due to tectonic activity.
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When new mountains or plateaus form, the cycle starts over. - This is also true, as the formation of new landforms leads to renewed weathering, erosion, and deposition processes.
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Weathering, erosion, and deposition have almost leveled Earth’s surface. - This statement is generally considered true as these processes tend to wear down landforms over long periods.
The other statements are false:
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Deposition leads to the breakdown of mountains. - This is misleading; while deposition can contribute to the leveling of landscapes, it does not directly lead to the breakdown of mountains.
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Gravity does not affect the rate of erosion. - This is false; gravity is a significant force affecting the rate and processes of erosion, including mass wasting and the movement of sediments.