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12 Cards in this Set
- Front
- Back
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fault |
a fracture along which rocks on one side have moved relative to rocks on the other side. |
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convergent plate boundary |
boundary formed where two lithospheric plates are moving toward each other. |
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divergent plate boundary |
boundary formed where two lithospheric plates are moving apart. |
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transformed plate boundary |
boundary formed where two lithospheric plates scrape sideways past each other. |
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focus |
location where energy is first released in an earthquake. |
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epicenter |
point on earth directly above the earthquake. |
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magnitude |
size of an earthquake |
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Richter Scale |
a numerical scale for expressing the magnitude of an earthquake. |
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seismograph |
tracing made by a seismograph, used to calculate the size of an earthquake and determine its location. |
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primary waves |
compressional waves that vibrate rock particles back and forth parallel to the direction the wave travels. |
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secondary wave |
shearin wave that vibrate rock particles perpindicular to the direction a wave travels. |
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surface waves |
a seismic wave that travels across the surface of the earth as opposed to through it. |
