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earthquakes123
| Word | Definition |
|---|---|
| Earthquake | Vibrations in the earth caused by the sudden releases of energy |
| Crust | The earth's outer layer; the coolest and least dense layer of the earth |
| Fault | A fracture in bedrock, along which blocks of rocks on opposite sides of the fracture move |
| Mantle | The layer of the earth beneath the crust |
| Lithosphere | The cool, solid outer shell of the earth |
| Lithospheric Plates | Large peices of the lithosphere that are always moving |
| Seismologist | A scientist who studies eartgquakes |
| P-Wave | Compress and expand the ground like an accordion |
| S-Wave | Vibrate from side to side |
| Surface Wave | Move more slowly than P Waves and S Waves |
| Seismic Wave | Carry the energy of an earthquake away from the focus, through the Earth's interrior, across the surface |
| Focus | The point at which a rock under stress breaks and triggers an earthquake |
| Epicenter | The point on the surface directly above the focus |
| Seismograph | Is an instrument that records and measures seismic waves |
| Magnitude | Is a number geologist assign to an earthquake based on the earthquake's strength |
| Ritcher Scale | Is a rating of an earthquake's magnitude based on size of earthquake's seismic waves |
| Mercalli Scale | Rate an earthquakes according to the level of damage at a given place |
| Moment-Magnitude Scale | A rating system that estimates the total energy realeased by an earthquake |
| Liquifaction | Occurs when an earthquake's violent shaking suddenly turns loose, soft soil into liquid mud |
| Aftershock | An earthquake that occurs after a large earthquake in the same area |
| Tsunami | The water displaced by a strong earthquake on the ocean floor forms a large wave |
Created by:
jjperry
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