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