Tectonic Hazards 0.0 / 5 ? GeographyTectonic HazardsGCSEOCR Created by: slaymaker_Created on: 30-01-17 13:35 How do tectonic plates move? Convection currents in the mantle 1 of 12 What is the difference between the focus and the epicentre The focus is the origin of the earthquake within the Earth’s crust. The epicentre is located directly above the focus on the Earth’s surface. 2 of 12 What is the different between plate movement for constructive and destructive plate boundaries? Constructive move apart Destructive move together and the oceanic is sub ducted 3 of 12 What is the difference between the Richter and Mercali Scale? Richter measures the magnitude of an earthquake. Mercali measures the amount of destruction 4 of 12 What are the primary effects of an earhquake? Landslides/tsunamis triggered. Roads, buildings and bridge collapse. Electricity and telephone poles destroyed. 5 of 12 How can the impacts of an earthquake be reduced? Creating stronger buildings, education, planning and aid. 6 of 12 Why do people live near volcanoes? Mineral rich soil for farming, tourism, geothermal energy used in electricity production, extracting minerals from volcano 7 of 12 What is a lahar? A combination of mud, rock. Pyroclastic material and water that can travel tens of metres a second 8 of 12 What is the different types of volcanoes between a constructive and destructive plate boundary? Constructive – usually shield, gentle eruption, ash ad lava Destructive – composite, explosive, lava and ash 9 of 12 What are pyroclastic flows? Avalanches of hot volcanic debris 10 of 12 What are the secondary effects of volcanoes? Homes destroyed, thick mud deposits from lahars, death and injury, can be high £ cost. 11 of 12 What are the four layers of the Earth? Crust, Mantle, Outer Core, Inner Core 12 of 12
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