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Knipp-7A-Earl-mani
Earthquake vocab
15
Geology
7th Grade
01/07/2013

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Term
Shear
Definition
The force that cause rocks on either side of a fault to slid past each other
Term
Compression
Definition
The force that squeeze rocks
Term
Tension
Definition
Forces inside of earth the cause rocks to be pulled apart
Term
Strike-slip fault
Definition
Fault moving past each other with out much upword our down ward movement
Term
Normal fault
Definition
Break in a rock caused by tention forces where rock above the fault moves down relative to the rock below the fault surface.
Term
Reverse fault
Definition
Break in rock caused by compressive forces where rock above fault surface moves upward realtive to the rock below the fault surface
Term
Fault
Definition
A surface along which rock will move when they pass their elastic limit and break
Term
earthquake
Definition
Vibrations produced when rocks break along a fault
Term
magnitude
Definition
Measure of energy released during an earthquake
Term
Liquifaction
Definition
Occurs when wet soil acts more like a liquid during an earthquake
Term
Seismograph
Definition
instrument used to measure earthquakes waves and record the time each occurred
Term
Focus
Definition
In an earthquake, the point below Earth's surface where energy is released in the form of a seismic wave.
Term
Epicenter
Definition
Point on earth's surface directly above an earthquakes focus
Term
Seismic Wave
Definition
Wave generated by an earthquake
Term
Tsunami
Definition
Seismic ave that begins over an earthquake focus and can be higly destructive when it crashes on shore
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