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Ch.6 Vocab:)

Earthquakes

QuestionAnswer
A large section of Earth's crust and rigid upper 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 the fault Earthquake
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
break in rock causedd by compressive forces, where rock above the fault suface moves upward relative to teh rock below the fault surface Reverse Fault
break in rock caused by shear forces, where rocks move past each other without much vertical movement Strike-slip Fault
rythmic movement that carries energy through matter and space. Wave
wave generated by an earthquake Seismic Wave
in an earthquake, the point below Earth's surface where energy is released in the forms of seismic waves Focus
seismic wave that moves rock particles back and forth in the same direction that the wave travels Primary Waves
siesmic wave that moves rock particles at right angles to the direction of the wave Secondary Waves
Seismic wave that moves rock particles up and down in a backward, rolling motion and side to side in a swaying motion Surface Wave
point on Earth's surface directly above an earthquake's focus Epicenter
instrument used to register earthquake waves and record the time that each arrived Seismograph
the highest point in a wave Crest
measure of the energy released during an earthquake Magnitude
occurs when wet soil acts more like a liquid during an earthquake Liquefaction
seismic wave that begins over an earthquake focus and can be highly destructive when it crashes on shore Tsunami
Created by: gymnast4life
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