2 Rocks Move Along Faults break in Earth’s lithosphere, where blocks of rock move past each otherAt some parts of a fault, the rock slides slowly or constantly. At others it sticks or locks together.Rock bends and stretches as stress is put on it ( think of a rubber band or popsicle stick)
3 Earthquake Earthquake Strength of an earthquake depends on shaking of the ground caused by the sudden movement of large blocks of rock along a faultOccurs when there is a sudden release of stress in the lithosphere.when the rocks break free from being stuckStrength of an earthquake depends onThe amount of stress built upThe distance the rocks move along the fault
4 The rocks that move Most faults are along tectonic plate boundaries Most earthquakes occur hereThe rocks that move during an earthquake are smaller than tectonic platesRarely do earthquakes happen in the middle of the plate.
5 Types of faults Faults are classified by how they move This is determined by the kind of stress the rocks are underMore than one type of fault can happen at a plate boundary
6 Normal Fault Occurs when stress pulls the rocks apart One chunk goes down the other shifts up.Earthquakes happen where chunks of rock are moving apartThe Great Rift Valley of Africa.forceforceMovement of rocks
7 Reverse Fault Occurs when stress presses rocks together One chunk ends up on top of the other.Occurs near convergent collision-zone boundaries between platesforceforceMovement of rocks
8 Strike Slip Faults Occurs when stress pushes rocks horizontally Blocks of rock move sideways on either side of the fault plane.Happens when plates scrape past each otherforceforceMovement of rocks