Multiple choice

Which of the following is an example of weathering?

  1. river current breaking down rock in a canyon

  2. rain causing water levels to rise in a river

  3. ocean waves carrying away sand from the coastline

  4. wind blowing grains of rock across the desert
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A Correct answer
Explanation

Weathering is the breaking down of rocks at the Earth's surface. A river current breaking down rock is a form of physical weathering (often combined with erosion).

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