WAEC Agricultural Science 2022 Objective — Question 11
Question 11 of 50 from the West African Examinations Council (WAEC) Agricultural Science 2022 Objective paper, with the correct answer and a full explanation.
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A difference between physical and chemical weathering is that
- A. there is a change in the mineral composition of rock in physical weathering
- B. the mineral composition of rock is changed in chemical weatheringCorrect
- C. carbonation is necessary in physical weathering
- D. wind is necessary in chemical weathering
Explanation
Physical weathering breaks down a rock's physical structure without changing its chemical/mineral composition, while chemical weathering alters the rock's mineral/chemical composition (e.g. through carbonation, oxidation, hydrolysis).
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