| A | B |
|---|
| Break in the Earth's crust along which blocks of crust slide relative to one another | fault |
| The study of earthquakes | seismology |
| Waves of energy from earthquakes that travel through the earth | seismic waves |
| The point on the earth's surface directly above the focus | epicenter |
| Scale that is used to measure the strength (magnitude) of an earthquake, goes from 1-10 | Richter Scale |
| Primary waves (p) | Fastest Waves, can travel through solid, liquid, and gas |
| Secondary waves (s) | Arrive second, cannot travel through liquids, move side to side |
| Surface Waves | Travel on the surface, cause the most damage |
| Tracing of an earthquake's motion | seismogram |
| Instrument used to record an earthquake | seismograph |
| Change in shape of rock due to stress | Deformation |
| The point along a fault at which the first motion of an earthquake occurs | focus |
| The sudden return of elastically deformed rock to its undeformed state | Elastic rebound |
| The type of deformation that does not lead to earthquakes | Plastic deformation |
| Refers to an earthquakes "intensity" on a scale from I to XII | Mercalli Scale |
