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How does the abundance of joints and cracks affect rock weathering?

Answer and explanation

Correct answer: It increases entry of water and air and speeds weathering

Direct answer: Option B, joints and cracks increase entry of water and air and speed weathering. A joint is a natural fracture in rock. Cracks enlarge the contact area and provide pathways through which water, oxygen, carbon dioxide, and plant roots can enter. Chemical reactions, freezing, root pressure, and other processes can then work deeper inside the rock. Option A is opposite to the fact: cracks do not reduce entry. Option C is impossible because weathering does not turn rock into lava. Option D is wrong because cracks can support, not prevent, biological activity. Cue: cracks are doors for weathering agents.

Related tags

JointsCracksWeathering Rate

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