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28 True/False questions

  1. shear wavesSeismic waves that travel along the Earth's surface.

          

  2. faultA large wave along the sea surface triggered by an earthquake or large submarine slump.

          

  3. seismic beltThe relatively narrow strips of crust on Earth under which most earthquakes occur.

          

  4. TsunamiA fracture on which one body of rock slides past another.

          

  5. intraplate earthquakeEarthquake that occurs away from plate boundaries.

          

  6. SeismicityEarthquake activity.

          

  7. DisplacementThe amount of movement or slip across a fault plane.

          

  8. LiquefactionThe transformation of seemingly solid sediment into a liquid-like slurry, in response to ground shaking.

          

  9. MagnitudeA vibration caused by the sudden breaking or frictional sliding of rock in the Earth.

          

  10. fault scarpA fracture on which one body of rock slides past another.

          

  11. aftershocksThe series of smaller earthquakes that follow a major earthquake.

          

  12. seismic wavesThe relatively narrow strips of crust on Earth under which most earthquakes occur.

          

  13. SeismogramAn instrument that can record the ground motion from an earthquake.

          

  14. compressional wavesWaves in which particles of material move back and forth parallel to the direction in which the wave itself moves.

          

  15. moment-magnitude scaleAny numerical representation of the size of an earthquake as determined by measuring the amplitude of ground motion.

          

  16. hypocenterThe point below the Earth's surface where the energy is produced during an earthquake.

          

  17. earthquakeAny numerical representation of the size of an earthquake as determined by measuring the amplitude of ground motion.

          

  18. Wadati-Benioff zoneA sloping band of seismicity defined by intermediate- and deep-focus earthquakes that occur in the down-going slab of a convergent plate boundary.

          

  19. ForeshocksThe series of smaller earthquakes that precede a major earthquake.

          

  20. surface wavesSeismic waves in which particles of material move back and forth perpendicular to the direction in which the wave itself moves.

          

  21. Mercalli intensity scaleA scale that defines earthquakes on the basis of the amplitude of the largest ground motion recorded on a seismogram.

          

  22. stick-slip behaviorStop-start movement along a fault plane caused by friction, which prevents movement until stress builds up sufficiently.

          

  23. recurrence intervalThe point on the surface of the Earth directly above the focus of an earthquake.

          

  24. elastic-rebound theoryThe concept that earthquakes occur when rock elastically bends until it fractures; the fracturing generates earthquake energy and decreases the elastic energy stored in the rock.

          

  25. SeismographAn instrument that can record the ground motion from an earthquake.

          

  26. Richter scaleA scale that defines earthquakes on the basis of the amplitude of the largest ground motion recorded on a seismogram.

          

  27. body wavesSeismic waves in which particles of material move back and forth perpendicular to the direction in which the wave itself moves.

          

  28. epicenterThe point below the Earth's surface where the energy is produced during an earthquake.