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science

science flash cards: unit 7

QuestionAnswer
Earthquake hazard a measure of how likely an area will have earthquakes in the future
shadow zone area on Earth's surface where no direct seismic waves from an earthquake are detected.
seismic waves waves of energy caused by earthquakes
seismologist scientist who studies earthquakes
plastic deformation permanent bend in rock
epicenter location on earth's surface directly above the focus of an earthquake
Righter Scale scale that shows the magnitude of an earthquake
seismogram tracing of earthquake motion created by a seismograph
focus point in Earth where an earthquake started
Surface waves seismic waves that go through the Earth
Moho place in Earth where seismic waves speed up, the boundary between the crust and mantle
elastic Rebound sudden return of elastically deformed rock to its original shape.
Causes of Earthquakes Energy releases in faults from elastic rebound and friction
Three scales for measuring earthquakes: Righter scale, Mercalli scale, and moment magnitude scale
Moment Magnitude Scale mostly used today, estimates energy releases, and has a scale of 0-10.
list the layers of the earth based on structure and identify the structure of each layer. structure: lithosphere (hard rigid); asthenosphere (putty like); mesophere (molten liquid rock); outer core (liquid); inner core (solid, dense)
Define deformation change of form, whether permanent or not.
identify the type of stress that caused a fault compression and tension
identify the two types of deformation and how they are different. elastic: bends and snaps back into place. plastic: permanent bend
List the three types of seismic waves. s waves (shear), p waves (primary), l waves (surface waves).
Created by: hunt398
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