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Why do abundant joints and cracks accelerate weathering?

Answer and explanation

Correct answer: They increase entry zones for water air and roots

Direct answer: Option D, cracks increase entry zones for water, air, and roots. Joints and cracks divide a rock surface and expose more edges. They let water, oxygen, carbon dioxide, and plant roots penetrate into the rock. These agents carry out chemical reactions, physical pressure, and biological action, so weathering becomes faster and deeper. Option A is wrong because cracks do not make rock completely waterproof. Option B is wrong because cracks do not block all sunlight and sunlight is not the main explanation. Option C is wrong because preventing sediment movement is unrelated to the cause of weathering. Option D correctly combines the important pathways and increased exposed area. Cue: more cracks mean more entrances for weathering.

Related tags

JointsCracksSurfaceWeathering

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