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Ch17 Earth and Space
Definitions from Earth and Space Science BJU Press Ch 17
| Term | Definition |
|---|---|
| earthquake | a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action. |
| elastic rebound | is an explanation for how energy is released during an earthquake. As adjoining plates on the Earth's surface move in opposite directions, the rocks which span the opposing sides of the incipient fault are subjected to extreme shear stress. |
| seismograph | detects earthquakes |
| richter scale | raitings of earthquakes |
| magnitude | energy released |
| intensity | how damaging |
| focus | center of earthquakes activity |
| epicenter | place of earths surface directly above the focus |
| tsusinami | a long high sea wave caused by an earthquake, submarine landslide, or other disturbance. |
| p wave | a longitudinal earthquake wave that travels through the interior of the earth and is usually the first conspicuous wave to be recorded by a seismograph. Expand. Also called primary wave |
| s wave | |
| L wave | |
| volcano | |
| vent | |
| lava | |
| volcanic cone | |
| crater | |
| caldera | |
| glowing avalanche | |
| lahar | |
| fumarole | |
| pyroclastic materials | |
| ash | |
| tephra | |
| cinder | |
| bomb | |
| shield volcano | |
| cinder cone | |
| composite cone | |
| stratovolcano | |
| active volcano | |
| dormant volcano | |
| extinct volcano | |
| circum pacific belt | |
| a-h belt | |
| geothermal gradient | |
| hot spring | |
| mud spot | |
| geyser | |
| geothermal energy |
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