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When a river flows over a cliff its

User Andy Hoyle
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A waterfall is a sudden drop in a river as it flows over a rock cliff. This happens when the river passes from a layer of hard rock to a layer of softer rock, and the water erodes away the softer rock. A watershed is the term given to the land that drains water into a particular stream, lake, or river.
User GRoutar
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Answer:Energy is coverted into a waterfall

Explanation:Answer:A waterfall is a sudden drop in a river as it flows over a rock cliff. This happens when the river passes from a layer of hard rock to a layer of softer rock, and the water erodes away the softer rock. A watershed is the term given to the land that drains water into a particular stream, lake, or river.

User NikosM
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