Science quiz on Earthquakes 2-6-09
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| focus focus | the point beneath earths surface where rock breaks under stress and causes an earthquake
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| epicenter | the point on earths surface directly above an earthquakes focus
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| seismic waves | a vibration that travels through earth carrying the energy released during an earthquake
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| P waves | a type of seismic wave that compresses and expands the ground
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| S waves | a type of seismic wave that moves the ground up and down or side to side
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| surface waves | a type of seismic wave that forms when P waves and S waves reach earths surface
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| seismograph | a device that records ground movements caused by seismic waves as they move through earth
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| magnitude | the measurement of an earthquakes strength based on seismic waves and movement along faults
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| mercalli scale | a scale that rates earthquakes according to their intensity and how much damage they cause
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| richter scale | a scale that rates seismic waves as measured by a particular type of mechanical seismograph
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| moment magnitude scale | a scale that rates earthquakes by estimating the total energy released by an earthquake
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Created by:
gpc1313