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11 Cards in this Set
- Front
- Back
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earthquake |
The shaking and trebling that results from movement of rock beneath Earth's surface. |
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focus |
The area beneath Earth's surface where rock that is under stress breaks, triggering an earthquake. |
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epicenter |
The point on the surface directly above the focus. |
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P wave |
Seismic waves are waves that compress and expand the ground like an accordion. The are the first waves to arrive. |
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S wave |
Seismic waves that vibrate from side to side as well as up and down. |
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surface wave |
A type of seismic wave that forms when P waves and S waves reach the Earth's surface. |
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Mercalli scale |
A scale that rates earthquakes according to their intensity and how much damage they cause at a particular place. |
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magnitude |
The measurement of an earthquake's based on seismic waves and movement along faults. |
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Richter scale |
A scale that rates and earthquake's magnitude based on the size of its seismic waves. |
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seismograph |
A device that records ground movements caused by seismic waves as they move through earth. |
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moment magnitude scale |
A scale that rates earthquakes by estimating the total energy released by an earthquake. |
