2.10 Vocab - Earthquakes

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Terms in this set (...)

seismologist
a scientist who studies seismic waves and the information they provide about the structure of the interior of Earth
fault
a fracture or fracture zone in rock, along which rock masses have moved relative to one another parallel to the fracture
shear strength
the force needed to break a solid material
elastic deformation
a nonpermanent deformation (bending), which recovers when the deforming force if removed
elastic rebound
the return of a bent elastic solid to its original shape after the deforming force is removed
friction
the force that resists the motion of one surface against another surface
fault plane
the surface of a fault along which rock masses move
primary wave (P wave)
a seismic wave that involves particle motion (compression and expansion) in the direction in which the wave is traveling
secondary wave (S wave)
a seismic wave produced by shearing motion that involves vibration perpendicular to the direction in which the wave is traveling; it doesn't travel through liquids, such as those forming the outer core of Earth
surface wave
a seismic wave that travels along the surface of Earth