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GCSE Geography · key term
The ability of a rock to allow water to pass through it.
Used by Edexcel
Specification 1.1, 1.2 · Paper 1
Revise: Geological Variations in the UKPermeability describes whether water can pass through it. A resistant rock can remain as high ground, while its permeability helps determine whether the surface is well drained or wet and boggy.
The ability of a material to allow water to pass through it.
Keep resistance and permeability separate: a rock can resist erosion but still allow water through.
Do not assume that all sedimentary rocks form lowlands. Resistance, permeability and rock structure also affect relief.
Keep rock resistance and permeability separate: resistance affects erosion; permeability affects water movement.
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Paper 2
Revise: Characteristics and Distribution of UK Rock TypesTwo useful properties are resistance and permeability. Resistance describes how well rock withstands erosion: more resistant rocks tend to remain as higher ground while weaker rocks are worn down more easily. Permeability describes whether water can pass through rock.
The ability of a rock to allow water to flow through it.
The ability of a material, such as rock or soil, to allow water to pass through it.