Earthquake
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| earthquake | Vibrations produced when rocks break along a fault.
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| epicenter | Point on Earth's surface directly above an earthquake's focus.
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| fault | Surface along which rocks move when they pass their elastic limit and break.
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| focus | In an earthquake, the point below earth's surface where energy is released in the form of seismic waves.
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| liquefaction | Occurs when wet soil acts more like a liquid during an earthquake.
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| magnitude | Measure of the energy released during an earthquake.
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| normal fault | Break in rock caused by tension forces, where rock above the fault surface moves down relative to the rock below the fault surface.
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| primary wave | Seismic wave that moves rock particles back-and-forth in the same direction that the wave travels.
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| reverse fault | Break in rock caused by compressive forces, where rock above the fault surface moves upward relative to the rock below the fault surface.
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| secondary wave | Seismic wave that moves rock particles at right angles to the direction of the wave.
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| seismic wave | Wave generated by an earthquake.
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| seismograph | Instrument used to register earthquake waves and record the time that each arrived.
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| strike-slip fault | Break in rock caused by shear forces, where rocks move past each other without much vertical movement.
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| surface wave | Seismic wave that moves rock particles up-and-down in a backward rolling motion and side-to-side in a swaying motion.
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| tsunami | Seismic sea wave that begins over an earthquake focus and can be highly destructive when it crashes on shore.
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Created by:
kyu
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