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Science vocab cards

vocab cards

stress a force that acts on rock to change its shape or volume
tension stress taht stretches rock so that it becomes thinner in the middle
compression stress that squezes rock until it folds or breaks
shearing stress that pushes masses of rock in opposite directions in a sideways movement
normal fault a type of fault where the hanging wall slides downward; caused by tension in the crust
reverse fault a type of fault where the hanging wall slides upward; caused by compresssion in the crust
strike-slip fault a type of fault in which rocks on either side move past each other sideways with little up or down motion
plateau a large landform that has high elevation and a more or less level surface
earthquake the shaking that results from the movement of rock beneath Earth's surface
focus the point beneath Earth's surface where rock first breaks under stress and causes an earthquake
epicenter the point on Earth's surface directly above and earthquakes surface
P wave a type of seismic wave that compresses and expands the ground
S wave a type of seismic wave in which the shaking is perpendicular to the direction of the wave
surface wave a type of seismic wave that forms when P waves and S waves reach Earth's surface
seismograph a device that records ground movements caused by seismic waves as they move through Earth
modified marcalli scale a scale that rates the amount of shaking from an earthquake
magnitude the measurement of an earthquake's strength based on seismic waves and movement along faults
richter scale a scale that rates an earthquake's magnitude based on the size of its seismic waves
movment magnitude scale a scale that rates earthquake's by estimating the total energy released by and earthquake
Created by: abaird