| Term | Definition |
|---|
| scientist who studies earthquakes | seismologist |
| machine that records primary , secondary and surface waves | seismograph |
| richter scale | measures amount of ENERGY released by earthquake (not waves) |
| ocean wave generated by an earthquake. breaks at on shore at 30m high, | tsunami |
| primary wave. speed? | fastest |
| secondary wave. speed? | medium |
| surface wave. speed? | slowest |
| primary waves arrive __ at a seismograph station | 1st |
| when traveling through different layers, the _______ of __________ changes | speed, seismic waves |
| crust -- outside or inside core | outside |
| insidemantle -- outside or inside the crust? | inside |
| energy waves generated by an earthquake | seismic waves |
| point in earths interior where the energy release occurs | focus |
| _____ are produced and travel outward from earthquake focus | seismic waves |
| waves of energy that can travel *** through the earth *** by causing particles to stretch apart in the direction of the wave | primary waves |
| waves of energy that can travel *** through the earth *** by causing particles in rocks to move at right angles to the direction of the the wave | secondary waves |
| point on earths directly above focus | epicenter |
| waves that each earths surface and travel outward along earths surface from the epicenter | surface waves |
| which waves cause the most destruction? | surface waves |
| earthquakes are caused when passing the __________ causes faulting | elastic limit |
| rocks can _______ . when their elastic limit is passed the rock remains (x2) _______ and can _________ | stretch, break |
| rocks break along surfaces called | faults |
| normal fault --- | tension |
| reverse fault -- | compression |
| strike-slip fault -- | shear forces |
| which seismic waves more back and forth ? | primary |
| which seismic waves move up and down (angled) ? | secondary |
| where are surface waves? on .. | earths surface |
| what measures earthquakesmagnitude? | richter scale |
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