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Earthquake+volcano

Year 9 Geography

TermDefinition
Magma molten rock in the earth's mantle
Epicentre where an earthquake originates/is focused
Lahar Indonesian word for mud-debris landslide that flows from volcanoes
Viscosity how thick or runny lava is, affects explosivity
Inner core centre of the earth, solid, made of iron and nickel
Focus point on the earth's surface directly above the epicentre
Plates large slabs of crust/rock which continually move and/or float on the mantle
Destructive plate boundaries A destructive plate boundary happens where an oceanic and continental plate move towards each other.
Convergent plate boundaries when the earth plates collide and the area is lost either by the shortening and crustal when the earth plates collide and the area is lost either by the shortening and crustal thickening or by the subduction of one plate beneath the other
Composite volcano Large, steep volcano built up of alternating layers of lava and ash or cinders
Dome volcano a roughly circular mound- shaped protrusion resulting from the slow extrusion of viscous lava from a volcano
Shield volcano a type of volcano usually built almost entirely of fluid lava flows.
Divergent plate boundaries places where the tectonic plates of the Earth are moving away from each other.
ash is blasted into the earth from a volcano
sulphur dioxide a gas which is blasted into the earth from a volcano
Created by: tescommonstacks