Geography 0.0 / 5 ? GeographyNatural hazardsGCSEEdexcel Created by: Glitterbug007Created on: 12-11-13 16:54 what is the richter scale a scale to show the magnitude of an earthquake 1 of 6 What protection method protects against volcanic bombs and ash concrete shelters 2 of 6 what is a plate margin the boundary between two tectonic plates 3 of 6 how are tsunamis caused? By undersea earthquakes 4 of 6 what is a primary effect an effect that happens straight away 5 of 6 Why do tectonic plates move? because of convection currents in the mantle 6 of 6
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