EarthquakesEarthquakes

By Josh andBy Josh and

CodyCody

How they happenHow they happen

11. They form when plates move apart.. They form when plates move apart. 2. It depends how far the plates move apart to 2. It depends how far the plates move apart to

how powerful the earthquake will be.how powerful the earthquake will be.

FaultsFaults

Normal faults cause tension in the earth’s crust Normal faults cause tension in the earth’s crust pulls rock apart.pulls rock apart.

Reverse faults are places in the rocks crust that Reverse faults are places in the rocks crust that are pushed togetherare pushed together

Strike slip fault is a fault that when plates Strike slip fault is a fault that when plates move past each other and start shearingmove past each other and start shearing

Sorry I cant fit a picture =[Sorry I cant fit a picture =[

StressStress

Tension stress is a stress that pulls on the crustTension stress is a stress that pulls on the crust Compression stress is stress that squeezes rock Compression stress is stress that squeezes rock

until it folds or breaksuntil it folds or breaks Shearing is stress that pushes a mass of rock in Shearing is stress that pushes a mass of rock in

two opposite directions.two opposite directions. Sorry that again I cant fit a picture =[Sorry that again I cant fit a picture =[

Folding Earths CrustFolding Earths Crust

Sometimes plate movement causes the crust to Sometimes plate movement causes the crust to fold.fold.

For example have you ever skidded on a rug For example have you ever skidded on a rug that wrinkled as your feet pushed it across the that wrinkled as your feet pushed it across the floor? If so that’s what folding the crust is floor? If so that’s what folding the crust is like!like!

TensionTension

Tension is a type of stress that constantly is Tension is a type of stress that constantly is pulling on the earth’s crust.pulling on the earth’s crust.