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GCSE Geography · key term
The breakdown of rock through chemical reactions that change or dissolve its minerals.
Used by Edexcel and OCR
Specification 1.3, 1.7 · Paper 1
The breakdown or alteration of rock through chemical reactions.
Revise: Coastal Physical ProcessesChemical weathering changes rock through chemical reactions. Rainwater absorbs carbon dioxide from the atmosphere and becomes slightly acidic. It can then react with minerals in rock.
Specification 3.2a · Paper 1, Paper 3
Revise: Geomorphic Processes: Weathering, Mass Movement, Erosion, Transport and DepositionChemical weathering changes the minerals in rock through chemical reactions. In carbonation, slightly acidic rainwater reacts with limestone and gradually dissolves it. Some soluble minerals also dissolve directly in water.
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