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chapter 8 and 10
| Term | Definition |
|---|---|
| earthquake | moments of the ground due to sudden release of energy |
| focus | point in earths interior where the earthquake occurred |
| seismic waves | waves of energy released by an earthquake |
| epicenter | point on earths surface difectly above the focus |
| elastic rebound | sudden return of deformed rock back to unformed shape |
| body waves | seismic waves that move through the inside of earth |
| p waves | push pull body waves |
| s waves | side to side waves |
| surface waves | seismic waves that move on earths surface |
| seismograph | all waves are recored on a seimograph |
| seismogram | pen traces vibrations onto a moving drum of paper to crete a seismogram |
| richter scale | numerical scale based on height of largest seismic wave magnitude |
| moment magnitude scale | small shallow quakes |
| modified mercalli scale | roman numeral scale that measures the intansity creating by an earthquake |
| liquefaction | phenomeron sometimes assoicate with earthquakes in which soils and other materials come with water and turn into a liquid that is not supported |
| tsunami | is a wave formed when the ocean floor shifts suddenly during a earthquake |
| seismic graph | a graph that reads how big a earthquake is. |
| crust | the thin , rocky outer layer of earth is divided into oceanic and continetal crust |
| mantle | 82 percent of earths volume is contained in the mantle a solid , rocky shell. |
| outer core | is a sphere having a radius of 1220 kilometers |
| inner core | are compressed into a solid state by the immense pressure |
| moho | short for mohorovicic discontinuity |
| ring of fire | a major area in the basin of the pacific ocean |
| hot spot | volcanic areas far from plate boundaries |
| viscosity | the state of being thick, sticky, and semifuid in consistency |
| vent | an opening as in a wall, an opening at the earths surface from volcanic material |
| pyroclastic material | composed of rock fragments of explosive orgin |
| volcano | opening vent that allows magma to escape to the surface |
| crater | a crater thats in the ground bowl shape cavity in the ground or on the surface |
| shield volcano | quiet eruptions of basaltic lava |
| cinder cone | explosive eruption of grantic lava |
| composite volcano | combination of forms lands |
| caldera | a large volcanic crater typically one formed by a major eruption leading to the collaspe of the mouth of the volcano |
| lahar | a destructive mudflow on the slopes of a volcano |
| pluton | a body of a intrusive rock |
| sill | a sheet of igneous rock intruede between and parallel with the existing strata |
| laccolith | a mass of igneous rock typically lens shaped that has been intruded between rock. |
| dike | a ditch or water course |
| batholith | a very large igneous intrusion extending deep in the earths crust |
Created by:
2007901
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