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Science #1

TermDefinition
vent The central opening in a volcanic area though which magma may escape.
lava Magma that reaches earth's surface and flows out of a vent.
crater A cuplike hollow that forms at the top of a volcano around the vent.
hot spot A very hot part of the sun's mantle
cylinder-cone volcano A steep sided cone that forms from explosive eruptions of hot rocks ragging from particles to boundaries.
shield volcano A wide, gently shaped cone that forms from flows of lava.
composite volcano A cone formed from explosive eruptions of hot rocks followed by a flow of lava, over and over.
Geothermal energy Heat from below earth's surface.
fault A huge crack in earth's crust.at or below the surface ,the sides of which may slow evidence of motions.
focus The point were an earthquakes starts as rocks began to slide past each other.
seismic waves A vibration that shred's out away from a focus when an earthquake happen.
epicenter The point on earth's surface directly above the focus of an earthquake.
aftershock Shaking of earth's crust after the internal shaking of a earthquake.
seismograph A sensitive device that detects the shaking of earth's crust during an earthquake.
magnitude The amount of energy released by an earthquake.
Crust Earths solid,rocky surface.
original horizontally The idea that many different kinds form flat horizontal layers.
Continental drift The idea that a super continent split apart into pieces.
sea floor spreading the idea that new crust is forming at ridges in the sea floor.
magma hot, molten rock below earth's surface.
plate tectonics the idea that earths surface is broken into plates.
mantale the layer benith earths crust.
subduction the sliding of a denser ocean plate under a nother plate.
Created by: Wolfgirl966
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