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Why can chemical weathering become faster after rock breaks into small pieces?

Answer and explanation

Correct answer: Because surface area increases

Direct answer: Option A, surface area increases. When one rock breaks into many small pieces, the total exposed surface becomes much larger. Water, oxygen, carbon dioxide, and other reacting substances can then touch more mineral particles. Chemical reactions therefore occur at more places and chemical weathering can become faster. Option A is correct. Option B is wrong because gravity does not disappear. Option C is wrong because climate continues to control weathering. Option D is wrong because minerals do not become permanent or immune to change. The idea is similar to powder reacting faster than a large lump because more surface is exposed. Cue: smaller pieces, larger contact, faster reaction.

Related tags

Surface AreaChemical WeatheringRock Particles

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