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Earthquake/Volcano

Study Guide (߆¨∂¥ ©¨ˆ∂´

QuestionAnswer
Pushes a mass of rock in two opposite directions(stress) Shearing
Pulls on the crust, stretching rock so that it becomes thinner in the middle(stress) Tension
Squeezes rock until it folds or breaks(stress) Compression
Rocks on either side of the fault slip past each other sideways with little up-or-down motion.(fault) Strike-slip
The fault is at an angle, so one block of rock lies above the fault while the other block lies below the fault.(fault) Normal
Has the same structure as a normal fault, but the blocks move in the opposite direction.(fault) Reverse
Where do faults usually occur? around plate boundaries
What is a Tsunami? a large wave produces by and earthquake on the ocean floor.
(type of seismic wave) the first waves to arrive. They compress and expand the ground like an accordion. Primary
(type of seismic wave) These come after the primary. Vibrate from side to side as well as up and down. Secondary
(type of seismic wave) Form when S and P waves reach the Earth's surface. They produce the most severe groung movements. Surface
How do we measure Earthquakes? Richter scale
Created by: smcguire6
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