Geography 4.0 / 5 based on 3 ratings ? GeographyGlacial landscapes and processesWater and riversPopulation changeStructure of the EarthTectonic HazardsGCSEAQA Created by: carla_300Created on: 07-03-15 13:01 What are the 4 layers of the Earth? Inner core, Outer core, Mantle and the Crust. 1 of 14 Why is the inner core dense? Because its made of dense metals e.g. Iron. 2 of 14 Why is the inner core so hot? There is a lot of pressure which causes heat. 3 of 14 Why do plates move? They move because of a convection current 4 of 14 How is a convection current caused? A convection current is caused by Adiabatic cooling. 5 of 14 what is Adiabatic cooling? This is when warm air rises and expands then starts to fall. 6 of 14 Where is there a concentration of earthquakes and volcanic activity? In the South West of North America. 7 of 14 What is a Destructive Plate Boundary. Its when the heavier plate sinks under the lighter plate. 8 of 14 What is a primary tectonic hazard? It's an event that occurs as a direct result of a volcanic eruption or earthquake. 9 of 14 What is a secondary tectonic hazard? It's an event that occurs because of a change in the environment following an earthquake or eruption (indirect). 10 of 14 What are the advantages of living near a volcano? Geo-Thermal energy, Tourism and recreation, Micro-organsms and Primary industries. 11 of 14 What is Geo-Thermal energy? They are rocks heated by magma below the earths crust, the heat from the rocks produce steam to make the energy. 12 of 14 Explain the benefits of geo-thermal energy to Iceland and mention some of its uses. The energy is cheap to produce and doesn't emit greenhouse gases, its also renewable. 13 of 14 Name 3 of Icelands spectacular scenery. 1)Basaltic cliffs 14 of 14
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