Why does the Sun rise in the east and set in the west each day?
September 11, 2021What causes the Northern Lights on earth?
September 11, 2021
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Bits of rocks are worn away by constant rubbing.
When rocks are in a river, rocks can rub against each other over and over when moving along the current. This usually leaves the rock in a rounder and smaller shape. It is considered erosion because the bits of rock worn away are eroded.
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