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Chapter 4 Earthquakes

Across
This type of wave moves slowly, almost in a circular motion.
The area where rocks under stress start to break.
A single number geologist assign to an earthquake based on the Earthquakes size.
A force that acts on rock to change its shape or volume.
A large area of flat land elevated high above sea - level.
All Earthquakes are compared to what, original scale.
A type of fault where rocks on either side of the fault slip past each other sideways.
Seismic waves that compress and expand the ground like an accordion.
A stress that pushes a mass of rock in two opposite directions.
The block of rock that sits over the fault.
Down
A tool that records and measures an earthquakes's seismic waves.
The point on the surface directly above the focus.
The rock that lies under the fault is called the footwall.
A type of fault that is found a Convergent boundaries.
This type of fault occurs at a divergent boundaries.
The stress that pulls on the crust and thins rock in the middle.
The stress on rocks that push them together until folding occurs.
the shaking and trembling that results from movement of rock beneath Earth's surface.
A crack or break in rock along which rock surfaces can slip.
Seismic waves that can vibrate from side to side or up and down.