Question

what causes waterfalls?

Answer 1

Answer:

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When two or more clouds bump into each other it causes rainfall.

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Answer 2

Often, waterfalls form as streams flow from soft rock to hard rock. This happens both laterally (as a stream flows across the earth) and vertically (as the stream drops in a waterfall). In both cases, the soft rock erodes, leaving a hard ledge over which the stream falls.

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