Holt Science and Technology: Inside the Restless Earth, Chapter 5, Sections 1 and 2
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12 terms
Terms | Definitions |
|---|---|
 seismology | the study of earthquakes |
| deformation | the bending, tilting, and breaking of the earth's crust; the change in the shape of rock in response to stress |
| elastic rebound | the sudden return of elastically deformed rock to its original shape |
| seismic wave | A wave of energy that travels through the Earth and away from an Earthquake in all directions. |
| P wave | a seismic wave that causes particles of rock to move in a back-and-forth direction |
| S wave | a seismic wave that causes particles of rock to move in a side-to-side direction |
| seismograph | an instrument that records vibrations in the ground and determines the location and strength of an earthquake |
| seismogram | a tracing of earthquake motion that is created by a seismograph |
| epicenter | the point on Earth's surface directly above an earthquake's starting point, or focus |
| focus | the point along a fault at which the first motion of an earthquake occurs |
| Richter Scale | a scale that rates an earthquakes magnitude based on the size of its seismic waves |
| Modified Mercalli Intensity Scale | the scale is a measure of degree with which the earthquake is felt by people and the damage cause by the earthquake |
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