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WalesGeographyQuick questions
Changing Landscapes (AS Unit 1)
Quick questions on Periglacial landscapes - WJEC A-Level Geography
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are periglacial processes?Show answer
Freeze-thaw weathering (frost shattering) is the principal weathering process: water seeping into joints expands by about nine per cent on freezing, prising rock into angular fragments. Frost heave lifts stones to the surface as ice lenses grow beneath them, and repeated heaving sorts coarse and fine material into patterns. Nivation is the localised weathering and erosion under and around a semi-permanent snow patch, hollowing out a nivation hollow. Solifluction (gelifluction over frozen ground) is the slow downslope flow of the saturated active layer; it operates on slopes as low as because the frozen layer beneath acts as a slide plane.
What is q1?Show answer
Define the term active layer. [2 marks]
What is q2?Show answer
Explain how solifluction moves material on gentle periglacial slopes. [3 marks]
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