Earthquake and Volcano (Natural Disasters) Glossary 5.0 / 5 based on 1 rating ? GeographytectonicsGCSEEdexcel Created by: GraceRobinsonCreated on: 23-12-15 10:36 Acid lava thick viscous lava which flows short distances 1 of 25 Basic lava thin runny lava which can flow long distances 2 of 25 Composite volcano steep sided cone with layers of ash and lava 3 of 25 Volcano A cone shaped mountain created by lava and ash being erupted by the earth 4 of 25 Shield volcano a gentle sided volcano with a wide base made up of basic lava 5 of 25 Compressional margin (convergent) this is where to plates move together 6 of 25 Core centre of the earth 7 of 25 crater mouth of the volcano 8 of 25 crust thin layer of the earths surface 9 of 25 earthquake a shaking of the earths crust 10 of 25 epicentre the point within the earths crust where the earthquake occurred 11 of 25 focus the point on the earths surface directly above the epicentre 12 of 25 fold mountains mountains formed by the earths movement 13 of 25 geosynclines a depression between two plates 14 of 25 lava the name given to a liquid magma when it reaches the surface of the earth 15 of 25 mantle the molten rock that surrounds the earths core 16 of 25 richter scale measures the strength of an earthquake 17 of 25 subduction zone where a plate sinks and slides under another plate 18 of 25 tectonic plate huge section of the earths crust 19 of 25 tensional margin (divergent) where two plates move apart 20 of 25 tsunami huge tidal wave thats caused by submarine earthquakes 21 of 25 vent the opening through which the lava flows in a volcano 22 of 25 Transform boundary plates move alongside each other 23 of 25 hotspot an area in the upper mantle from which heat rises in a plume from deep in the Earth. 24 of 25 The Mercalli scale the intensity of an earthquake 25 of 25
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