Geography 2.5 / 5 based on 2 ratings ? GeographyNatural hazardsGCSEOCR Created by: Sally CockayneCreated on: 29-12-14 16:20 Aftershocks Smaller earthquakes that occur in the same general area after the larger event. 1 of 16 Plate Tectonics The study of the distribution and movement of the Earth's crustal plates. 2 of 16 Fault Line A fracture in the Earth's crust that shows signs of movement. 3 of 16 Subduction zone The area of a destructive plate boundary where one plate descends beneath. 4 of 16 Pyroclastic Flow Avalanches of hot volcanic debris. 5 of 16 Lahar A type of mudflow composed of pyroclastic material and water that flows down from a volcano, typically along a river valley. 6 of 16 Shield volcano A volcano that covers a large area with very gently sloping sides. 7 of 16 Strato volcano Is typically a tall, conical volcano composed of many layers. 8 of 16 Geothermal Energy generated by heat stored deep in the earth 9 of 16 GPS A group of satellites that allow people to find out their exact location on the Earth's surface. 10 of 16 Epicentre The point on the Earth's surface directly above the focus of an Earthquake. 11 of 16 Seismic Waves Vibrations generated by an earthquake - can be measured using a seismic meter. 12 of 16 Blind Fault One where the fault line does not reach the surface. 13 of 16 Convergent Boundary Where plates collide with one another and on subducts beneath the other. 14 of 16 Divergent Boundary Where plates move apart from one another. 15 of 16 Transform Boundary Where plates slide past one another and pressure builds up - typically the cause of an earthquake. 16 of 16
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