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Chapter 8&10
| Term | Definition |
|---|---|
| earthquake | The vibration of the earths produced by the rapid release of energy |
| focus | the point within earths where an earthquake originate |
| seismic waves | vibrations that travel through earth carrying the energy released during an earthquake. |
| epicenter | the location on earths surface directly above the focus or origin ,of an earthquake |
| elastic rebound | tendency for for deformed rock along an fault a spring back |
| body waves | seismic waves that move through the inside body of earths |
| P waves | push-pull body waves |
| S waves | side -to -side body waves |
| surfaces waves | seismic waves that move on earths surfaces |
| seismograph | in instrument that records seismic waves |
| seismogram | the record made by the seismograph |
| Richter Scale | numerical scales (1-2)based on height of largest seismic waves (matitude) |
| Moment Magnitude Scale | a more precise measure of earthquake magnitude than the Richter scale ,which is derived from the amount of displacement that occurs along a fault zone and estimate the energy released by an earthquake |
| Modified Mercalli Scale | roman numerical scale that measure the intensity created by an earthquake |
| liquefaction | an phenomenon ,sometimes associated with earthquakes ,in which soils and other unconsolidated materials saturated with water are turned into a liquid that is not able to support building |
| tsunami | |
| seismic | |
| crust | |
| mantle | |
| outer core | |
| inner core | |
| Moho | |
| Ring of Fire | |
| hot spot | |
| viscosity | |
| vent | |
| pyroclastic material | |
| volcano | |
| crater | |
| shield volcano | |
| cinder cone | |
| composite volcano | |
| caldera | |
| lahar | |
| pluton | |
| sill | |
| laccolith | |
| dike | |
| batholith |