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Knipp-7A-Joby Harvey
Earthquake Facts
15
Geology
7th Grade
01/07/2013

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Cards

Term
Shear
Definition
The force that causes rocks on either side of a fault to slide past each other
Term
Compression
Definition
The force that squeezes rocks together
Term
Tension
Definition
The force that pulls rocks apart
Term
Strike-Slip Fault
Definition
A fault where rocks slide past each other by shear forces
Term
Normal Fault
Definition
A fault where rocks are pulled apart by tentional forces
Term
Reverse Fault
Definition
A fault where rocks are pushed together by compressionforces
Term
Fault
Definition
Surface along which rocks 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 durring an earthquake
Term
Seismograph
Definition
Instrument used to register earthquake waves and record the time that each arrived
Term
Focus
Definition
In an earthquake, the point below Earth's surface where energy is released in the form of seismic waves
Term
Epicenter
Definition
Point on Earth's surface directly above an earthquake's focus
Term
Seismic wave
Definition
Wave generated by an earthquake
Term
Tsunami
Definition
Seismic sea wave that begins over an earthquake focus and can be highly destructive when it crashes on shore
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