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If water repeatedly freezes and thaws in rock cracks which process occurs?

Answer and explanation

Correct answer: Frost weathering

The direct answer is B, frost weathering. This is a physical weathering process caused by repeated freezing and thawing of water inside rock cracks. Step by step: water enters a crack; when temperature falls below freezing, the water turns to ice and expands; pressure pushes against the crack walls; when it thaws, more water can enter; repeated cycles widen the crack and may break the rock. Option A, hydrolysis, is a chemical reaction between water and minerals, not simple freezing and thawing. Option B is correct because freeze-thaw action is frost weathering. Option C, carbonation, involves carbonic acid reacting with minerals, especially limestone. Option D, oxidation, commonly involves oxygen reacting with minerals such as iron-bearing minerals. Memory cue: freeze, expand, crack—frost weathering.

Related tags

Freeze ThawFrost WeatheringPhysical Weathering

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