Multiple choice

Which of the following is an example of physical weathering?

  1. rocks changing color with oxidation

  2. soil moving to another area

  3. acid rain changing a rock's composition

  4. water breaking down a boulder into a stone
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Physical weathering is the mechanical breakdown of rock into smaller pieces without changing its chemical composition. Water breaking a boulder is a mechanical process.

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