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knipp-7G-higgyjenk
earthquake facts
12
Geology
7th Grade
01/07/2013

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Cards

Term
shear
Definition
force that occurs at a strike slip fault
Term
compression
Definition
force that occurs at a reverse fault
Term
tension
Definition
force that occurs at a normal fault
Term
strike slip fault
Definition
break in rock caused by shear force where rocks move past each other without much vertacal movement
Term
normal fault
Definition
break in rock caused by tension forces where rock above the faults surface moves down relative to the rock below the rocks surface
Term
reverse fault
Definition
break in rock caused by compression forces where rock above the faults surface moves upward relative to the rock elow the rocks surface
Term
fault
Definition
surface along which rocks move when they pass their elastic limit and break
Term
earthquake
Definition
vibration producedwhen rocks break along a fault
Term
magnitude
Definition
measure of the energy released during an earthquake
Term
liquifaction
Definition
ocurrs when wet soil acts like a liquid during an earthquake
Term
Seismograph
Definition
instrument used to register earthquake wave and record the times that each arrived 
Term
Focus
Definition
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