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6.E.2.2 Volcanoes- E
| Question | Answer |
|---|---|
| earthquake | a sudden movement of the Earth's crust caused by the release of stress accumulated along geologic faults or by volcanic activity. |
| tectonic plates boundaries | most earthquakes take place along these |
| fault | a break in the Earth's crust |
| focus | the point inside the Earth, along a fault, at which an earth- quake begins |
| epicenter | the point on the earth's surface directly above an earth- quake's starting point, or focus |
| seismologist | scientists who study earthquakes |
| seismology | the scientific study of earthquakes |
| seismograph | an instrument located at or near the surface of the Earth that records seismic waves |
| seismic wave | the waves produced by an earthquake |
| primary wave | the first wave to be detected during an earthquake; are longitudinal |
| secondary wave | the second wave to be detected during an earthquake; are transverse |
| surface wave | a type of seismic wave that forms when P waves and S waves reach Earth's surface; most destructive |
Created by:
mcclellanfac
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