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An earthquake is shaking and trebling that results from a movements from a rock beneath the Earth's surface. Moment of the Earth's plates makes pull the rock in the crust. These focus are examples of stress, a power on a rock that changes it's form. Because stress is a force, it adds energy to the rock. the energy in a rock until is either break or changes shape. The three types of stress that occur in the crust are shearing, tension, and compression. Shearing,tension,compression work of millions of years to change it's shape and volume. These forces make some of the rocks to become brittle and snap,while other rocks bend slowly. Shearing is a type of stress that pushes a lot of rock in two opposite destines. It will cause the rock to split or break apart or to change it's shape. Tension stress pulls on the crust,stretching the rock so that it becomes thinner in the middle. It happens when two plates are falling apart. Compression is a stress that squeezes a rock until it folds or breaks apart. One plate pushing against another rock can compress rock. A change in the volume or shape of the Earth's crust is called deformation. You can not see it right away because it goes slowly but if you speed up time you could see the change. Many types of rocks bend and fold but beyond a certain limit,they will break when a rock builds up enough stress. It will break,creating a fault. A fault is slabs of that slip puts each other. The rock on both sides of a faulr can move up or down or sideways. Faults will happen most of the time by plates boundaries where the forces of plate motion compress,pull or shear the crust so much that the faults are strike-slip faults normal faults, and reverse, faults. Shearing is what makes strike-silp faults, A strikesilp fault is a.
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