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ch. 6 vocab. words

QuestionAnswer
plate a large section of earth's crust and rigid upper-mantle that moves around on the asthenosphere.
fault surface along which rocks move when they pass their elastic limit and break.
earthquake vibrations produced which rocks break along fault.
normal fault break in rock caused by tension forces; rock above surface moves down to relative rock below that surface.
reverse fault break in rock caused by compressive forces; rock moves upward.
strike-slip fault break in rock caused by shear forces, rocks move past each other without much vertical movement
wave rhythmic movement that carries energy through matter and space
seismic wave wave generated by an earthquake
focus in an earthquake, the point below earth's surface where energy is released in the form of seismic waves
primary wave seismic wave that moves rock particles back and forth in the same direction that the wave travels
secondary wave seismic wave that moves rock particles at right angles
surface wave seismic wave that moves rock particles in a back and forth and side to side motion
epicenter point on earth's surface directly above an earthquake's focus
seismograph instrument used to register earthquake waves and record the time that each arrived
crest the highest point in a wave
magnitude measure of energy released during an earthquake
liquefaction occurs when soil acts more like a liquid during earthquakes
tsunami seismic sea waves that begin over an earthquake focus and can be highly destructive when it crashes on shore
Created by: Hikari Uchiha
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