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Plate Tectonics

Important terms and ideas relating to Volcanoes, Earthquakes and Plate movement

Seismograph The instrument used to measure the force of an earthquake
Tsunami Giant tidal wave caused by an earthquake or volcanic eruption underwater
Convection Currents Causes the movement of plates
Crust Consists of about 15 plates and is like the skin of the earth
Continental Drift The movement of plates
Fold Mountains Found where plates collide
Focus Center of earthquake beneath the surface
Epicentre Point at which earthquake is felt the strongest on the earths surface
Fault Lines The point where two plates meet
Earthquake A series of seismic waves or tremors in the earth's crust
Aftershocks Tremors that occur in the hours or days after the original earthquake
Richter Scale This is used to describe the force of the earthquake
Mantle Area where magma is stored and is 4000'C
Core Center of the earth that consists of hot metals
Volcano Caused when two of the earth's plates separate
Lava What magma is called when it reaches the earth's surface
Active A volcano that erupts frequently
Dormant A volcano that has not erupted in a long time, but could possibly still erupt
Extinct a volcano that has not erupted in historic times
Caldera Formed when ground collapses after a volcanic eruption
Created by: dxm1055



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