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10 Cards in this Set

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earthquakes
the shaking and trembling that results from the movement of rock benteath the earths surface
stress
a force that acts on rock to change its shape or volume
What do shearing, tension, and compression do?
they work over millions of years to change the shape and volume of rock
shearing
stress that pushes a mass of rock in two opposite directions

it can cause rock to break and slip apart of change its shape
tension
this stress pulls on the crust, streching rock so that it becomes thinner in the middle

(extension, extending, away)
comression
this stress squeezes rock unitl it folds or breaks
deformation
any change in the volume or shae of Earth's crust
fault
a break in Earth's crust where slabs of crust slip past each other
faults usually occur along plate boudaries,where the forces of plate motion compress,pull,or shear the crustso much that the crust breaks
stike-slip fault (caused by sheaing)
the rock on either side of the fault slip past each other sideways with little or no up-or-down motion
normal fault (caused by tension)
the fault is at an angle, so one block of rock lies above the fault while the other block lies below the fault
half of fault above rock=hanging wall
half of fault below rock=foot wall