Which process of mechanical weathering involves the expansion of water as it freezes inside rock fractures?
Answer and explanation
Correct answer: C. frost wedging
- Step 1: Water expands by about 9% upon freezing, exerting immense pressure that widens cracks and shatters rock (frost wedging). Answer: frost wedging (freeze-thaw weathering). Why not the others: Hydrolysis is chemical; root chelation is biological.
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