Waves

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Across
  1. 4. a wave where particles travel parallel to the wave
  2. 6. slower, destructive waves that follow p waves
  3. 8. instrument used to study earthquakes
Down
  1. 1. a wave where particles move perpendicular to the wave
  2. 2. vibrations that are released during earthquakes
  3. 3. fast seismic waves that cause the ground to compress and expand
  4. 5. a scientist who studies earthquakes and seismic waves
  5. 7. vibrations on the Earth's surface caused by a slipped fault