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earthquakes
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Stress
A force that acts on rock change it's volume or shape
Tension
pulls on the crust stretching rock so it becomes thinner in the middle crust
compression
squeezes rock until folds or break
shearing
stress that pushes a mass of rock into opposite directions
normal fault
tension in earth crusts pulls rock apart causing normal faults
hanging wall
the block of rock that lies above
Foot wall
the rock below is called foot wall
reverse faults
has the same structure as a normal fault but moves together and uses compression
strike slip fault
using sheering and slip side past each other
anticline
a fold in rock that bends into an arch
Syncline
a fold in the rock that bends downward into a valley
Plateau
is a a large area of land elevated above sea level
earthquake
is shaking and trembling that results the movement of rock beneath earth's surface
focus
is the area beneath the Earths surface where rock is under stress breaks and triggers an earthquake
epicenter
the point on surface directly above the focus
p waves
the seismic waves that compress and expand the grounds
S waves
seismic waves that vibrate from side to side and up and down
Surface Waves
move slow and produce severe ground movements
mercallie scale
was developed to rate earthquakes damage
magnitude
is a number that geoligists assign to the earthquake based on the earthquakes size
richter scale
is a rating on earthquakes magnitude seismic waves
seismograph
records and measures seismic waves
moment magnitude scale
measures the energy released in an earthquake
Author
cooldude2198
ID
202377
Card Set
earthquakes
Description
Earthquakes
Updated
2013-02-22T00:11:34Z
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