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If cracks first form in a rock and then acidic water enters, what will happen?

Answer and explanation

Correct answer: Surfaces and pathways for chemical weathering will increase

Cracks create fresh openings and increase the area of rock that can come into contact with water. When acidic water enters these openings, it can react with susceptible minerals along the crack walls. Thus, physical weathering can prepare the rock for faster chemical weathering. The two processes often work together rather than acting as completely separate events.

Option B follows directly from this sequence: first the cracks provide pathways, and then acidic water uses those pathways to reach more rock. Chemical reactions can therefore occur over a larger accessible surface. Option A is opposite to the likely result, while option C ignores the purpose of cracks. A rock does not instantly become a fossil, so option D is unrelated. The speed still depends on acidity, minerals, moisture, and temperature.

Related tags

Physical Chemical LinkCracksAcidic Water

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