Geography Key Terms 4.5 / 5 based on 3 ratings ? GeographyRural and urban challenges and regenerationPlate tectonicsNatural hazardsA2/A-levelAQA Created by: PrayingForA'sCreated on: 13-02-16 15:44 What happens at a constructive plate boundary? 2 plates move away from each other 1 of 9 What is the focus? The point below the surface where the crust cracks and the earthquake begins 2 of 9 What happens at a destructive boundary? The oceanic crust subducts under the continental crust 3 of 9 What does the richter scale measure? Magnitude of earthquakes 4 of 9 What are social impacts? Impacts of a natural hazard that affect people 5 of 9 What is a composite volcano? A volcano with steep slopes + layers of ash and lava 6 of 9 Shield volcano A volcano with gentle slopes 7 of 9 Lahar A mudflow created by pyroclastic flow and water 8 of 9 Viscous lava Thick lava which has cooled quickly and flows slowly 9 of 9
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