Shared Flashcard Set

Details

Knipp/7F/Woodbach
Earthquake Facts
15
Geology
7th Grade
01/07/2013

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Cards

Term
Shear
Definition
The force in a strike-slip fault
Term
Compression
Definition
Forces that squeeze objects together
Term
Tension
Definition
Forces that pull apart, and can stretch Earth's crust
Term
Strike-slip fault
Definition
Break in rock caused by shear forces,where rocks move past each other without much verticle movment
Term
Normal fault
Definition
Break in rock caused by tension forces where rock above the fault surface moves down relative to the rock below the surface
Term
Reverse fault
Definition
Break in rock cause by compressive forces where rock above the fault surface moves upward relative to the rock below the fault surface
Term
Fault
Definition
Surface along which rocks move when they pass there elastic limit and break
Term
Earthquake
Definition
Vibration produced when rocks break along the fault
Term
Magnitude
Definition
Measure of energy released during an earthquake
Term
Liquifacation
Definition
Occurs when wet soil acts more like liquid during a earthquake
Term
focus
Definition
is an earthquake, the point below Earth's surface where energy is released in the form of seismic waves
Term
tsunami
Definition
seismic sea wave that begins over an earthquake focus and can be highly destructive when it crashes on shore
Term
epicenter
Definition
point on Earth's surface directly above an earthquake's focus
Term
seismic wave
Definition
wave generated by an earthquake
Term
seismograph
Definition
instrument used to register earthquake waves and record the time that each arrived
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