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Knipp-7F-Mahrizio
earthquake facts
15
Geology
7th Grade
01/07/2013

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Cards

Term
shear
Definition
the force that causes a strike-slip-fault
Term
compression
Definition
the force that forms the reverse fault
Term
tension
Definition
the force that form the normal fault
Term
True
Definition
T/F- Strike-Slip faults are caused by the force shear
Term
normal fault
Definition
break in rocks caused by tension forces where rock above the fault surface moves down
Term
reverse fault
Definition
break in rocks caused by compressive forces where rock above the fault surface moves up
Term
fault
Definition
surface along which rocks move when they pass their elastic limit and break
Term
earthquake
Definition
vibrations produced when rocks break along a fault
Term
magnitude
Definition
measure of the energy released during an earthquake
Term
Liquefaction
Definition
occurs when wet soil acts more like a liquid during an earthquake
Term
seismograph
Definition
instrument used to register earthquake waves and record and the time that each arrived
Term
focus
Definition
in an earthquake, the point below the earth's surface where energy is released in the form of seismic waves
Term
epicenter
Definition
point on earth's surface directly above an earthquake's focus
Term
sesmic wave
Definition
wave generated by an earthquake
Term
tsunami
Definition
seismic sea wave that begins over an earthquake focus and can be highly destructive when it crashes on shore
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