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Earthquakes
By Josh and
Cody
How they happen
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1. They form when plates move apart.
2. It depends how far the plates move apart to
how powerful the earthquake will be.
Faults
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Normal faults cause tension in the earth’s crust
pulls rock apart.
Reverse faults are places in the rocks crust that
are pushed together
Strike slip fault is a fault that when plates
move past each other and start shearing
Sorry I cant fit a picture =[
Stress
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Tension stress is a stress that pulls on the crust
Compression stress is stress that squeezes rock
until it folds or breaks
Shearing is stress that pushes a mass of rock in
two opposite directions.
Sorry that again I cant fit a picture =[
Folding Earths Crust
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Sometimes plate movement causes the crust to
fold.
For example have you ever skidded on a rug
that wrinkled as your feet pushed it across the
floor? If so that’s what folding the crust is like!
Tension
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Tension is a type of stress that constantly is
pulling on the earth’s crust.