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# Ch. 6 Vocab Quiz

TermDefinition
Earthquake a series of low-frequency shock waves, traveling through the earth
Stress is a measure of force exerted within an object
Compression forces that crush
Tension forces that pull
Shear push or pull in opposite directions
Divergent Boundaries plates are moving apart
Convergent Boundaries plates are moving toward each other
Transform Boundaries plates slide past each other in the opposite direction
Strain any change in a solid under stress
Joint cracks that form in a rock due to stress factors
Fault occurs when sections of rock on opposite sides of the crack move relative to each other
Strike the compass direction of a fault
Dip the angle of the fault
Dip-Slip Fault when a fault's motion is parallel to its dip
Normal Fault when the block above the fault surface dropped in relation to the block under the fault
Reverse Fault when the upper block rose in relation to the lower block
Strike-Slip Fault when the motion along the fault is horizontal
Seiesmometer instruments that detect earthquake waves
P Wave fastest body wave, relatively small amplitudes and short wavelengths, travel through both solid and liquid rock in the earth's interior
S Wave much larger amplitude, and much stronger but slower wavelengths,they travel through the earth's interior and are called body waves
Surface Wave they reach the seismic station last and travel along the earth's surface
Focus the center of an earthquake's activity
Epicenter the point on the earth's surface directly above the place the earthquake actually occurs
Richter Scale A familiar system of reporting the magnitude or energy of an earthquake
Magnitude the measure of an earthquake's energy
intensity is a measure of of how much damage actually results from the earthquake
Tsunami forms when seismic waves shake a body of water
Created by: CaptainSparkles

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