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    Question

    Which of the following is NOT a type of physical

    weathering?
    A Frost action Correct Answer Incorrect Answer
    B Thermal expansion Correct Answer Incorrect Answer
    C Exfoliation Correct Answer Incorrect Answer
    D Hydration Correct Answer Incorrect Answer
    E Salt crystallization Correct Answer Incorrect Answer

    Solution

    Hydration is a type of chemical weathering, not physical weathering. Physical weathering involves the mechanical breakdown of rocks into smaller fragments without changing their chemical composition. Examples include frost action, thermal expansion, exfoliation, and salt crystallization.

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