Tectonics Keywords 4.5 / 5 based on 2 ratings ? GeographyNatural hazardsGCSEAQA Created by: 10ruddlCreated on: 10-06-14 20:44 Focus The point in the earth's crust where and earthquake originates 1 of 26 Geothermal Water that is heated beneath the ground, which comes to the surface in a variety of ways 2 of 26 Geyser Where water erupts into the air under pressure 3 of 26 Caldera The depression of a supervolcano marking the collapsed magma chamber 4 of 26 Earthquake A sudden and often violent shift in the rocks forming the earth's crust that is felt at the surface 5 of 26 Plate A section of the earth's crust 6 of 26 Lahar Secondary effect of a volcano-mud flow resulting from ash mixing with melting ice or water 7 of 26 Richter Scale Logarithmic scale ranging from 0 to 10, used for measuring earthquakes based on the amount of movement. 8 of 26 Vent Opening (usually central/singular) in an volcano from which magma is emitted 9 of 26 Supervolcano A mega colossal volcano that erupts at least 1,000km cubed of material 10 of 26 Epicentre The point at the earth's surface directly above the focus of an earthquake 11 of 26 Tsunami A type of wave where the entire depth of the sea/ocean is set in motion, often by an earthquake, which displaces the water above it 12 of 26 Mantle The dense, mostly solid layer between the outer core and the crust 13 of 26 Subduction The sinking of oceanic crust at a destructive plate margin 14 of 26 Crust The outer layer of the earth 15 of 26 Plate Margin The boundary where two plates meet 16 of 26 Prediction Attempts to forecast an event (when and where) based on current knowledge 17 of 26 Preparation Organising activities and drills so people know what to do in the event of an earthquake 18 of 26 Protection Constructing buildings so they are safe to live in and will not collapse 19 of 26 Collision The meeting of two plates of continental crust. They are both the same type, so they meet 'head on' and buckle (generally creating fold mountains). 20 of 26 Secondary Effects The after-effects that occur as an indirect effect of an event 21 of 26 Primary Effects Immediate effects of an event like an earthquake or a volcanic eruption 22 of 26 Aid Money, food, training and technology given by richer countries to poorer ones, to help with an emergency or long-term development 23 of 26 Immediate Response How people react as a disaster happens and in the immediate aftermath 24 of 26 Long-term Response Later reactions that occur in the weeks, months and years after an event 25 of 26 Fissures Extended openings along a line of weakness that allow magma to escape 26 of 26
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