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Which statement shows the effect of rock texture on the rate of weathering?

Answer and explanation

Correct answer: Water can enter porous rock more easily

The direct answer is A, water can enter porous rock more easily. Rock texture means the size, arrangement, and spaces between mineral grains. Pores, cracks, and openings allow water and air to enter, so chemical reactions and freeze-thaw action can work through more of the rock. Step by step: porous texture provides pathways; water enters; minerals react or repeated pressure acts inside openings; weathering can proceed faster than in a compact rock under similar conditions. Option A is correct because it directly connects porosity with easier entry of water and therefore a possible change in weathering rate. Option B is wrong: rocks differ in mineral composition, hardness, porosity, and cracks, so they do not weather at the same speed. Option C is wrong because dense rock does not always dissolve; density alone does not make a rock soluble. Option D is wrong or irrelevant because colour by itself does not determine the weathering process; mineral composition and texture are more useful factors. Memory cue: more pores mean more pathways for water, so texture can change weathering speed.

Related tags

Rock TexturePorosityWeathering Rate

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