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science ch 8 vocab

TermDefinition
seismology the study of earthquakes.
deformation the bending, tilting, and breaking of the earths crust; the change in the shape of rock in response to stress.
elastic rebound the sudden return of elastically deformed rock to its undeformed state.
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 side-to-side direction.
seismograph an instrument that records vibrations on 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 earths 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.
gap hypothesis a hypothesis that is based on the idea that a major earthquake is more likely to occur along the part of an active fault where no earthquakes have occurred for a certain for a certain period of time
seismic gap an area along a fault where relatively few earthquakes have occurred recently but where strong earthquakes have occurred in the past
Created by: Xavier Vanhorn