click below
click below
Normal Size Small Size show me how
brittany ch. 6
earthquakes
| Question | Answer |
|---|---|
| a large section of earths crust and rigid uper mantle that moves around on the asthenosphere | plate |
| surface along which rocks move when they pass their elastic limit and break | fault |
| vibrations produced when rocks break along a fault | earthquakes |
| break in rock caused by tension forces, where rock above the fault surface moves down relative to the rock below the fault surface | normal fault |
| repeated echoes of sound waves | reverse fault |
| break in rock caused by shear forces, where rocks move past each other without much vertical movement | shrike-slip fault |
| rhythmic movement that carries energy through matter and space | wave |
| point on earths surface directly above an earthquakes focus | epicenter |
| wave generated by an earthquake | seismic wave |
| in an earthquake, the point below earths surface where energy is released in the form of seismic waves | focus |
| seismic wave that moves rock particles back and forth in the same direction that the wave travels | primary waves |
| sei |