Terms and Definitions
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| Epicenter | point on Earth's surface directly above an earthquake's focus
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| Fault | fracture that occurs when rocks break and that results in relative movements of opposing sides ; can form as a result of compression (reserve fault) , being pulled apart(normal fault) , or shear (strike-slip fault)
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| Focus | point deep inside Earth where energy is released causing an earthquake
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| Lava | molten rock flowing onto Earth's surface
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| Lithosphere | rigid layer of earth about 100 km thick , mad o the crust and a part of the upper mantle.
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| Seismograph | An instrument used to detect and record earthquakes
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| Subduction | the process of an ocenic plate colliding with descending underneath a continental plate
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| Ritcher Scale | used to measure the strength of earthquakes
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| Ring Of Fire | the zone of earthquakes and volcanoes surrounding the Pacific Ocean
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| seismic waves | waves from an earthquake are known as these
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| fault | a crack oin the eaths surface along which movement takes place
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| tsunami | large ocean wave created by undersea eathquakes or volcanic eruptions
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| Mexico | this country's capital city was devastaded in by an earthquake in 1985
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MishiP
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