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Chapter 19Earthquake
Earthquake vocabulary
Question | Answer |
---|---|
seismology | the study of earthquakes |
deformation | the bending, tilting, and breaking of the Earth's crust; the change in the shape of rock in response to stress |
elastic rebound | the sudden return of elastically deformed rock to its undeformed shape |
seismic wave | a wave of energy that travels through the Earth, away from an earthquake in all directions |
p wave | a seismic wave that causes particles of rock to move in a back and forth direction |
s wave | a seismic wave that causes particles of rock to move in a side to side direction |
seismograph | an instrument that records vibrations in the ground and determines the location and strength of an earthquake |
seismogram | a tracing of earthquake motion that is created by a seismograph |
epicenter | the point on Earth's surface directly above an earthquake's starting point, or focus |
focus | the point along a fault at which the first motion of an earthquake occurs |