earth quakes

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Across
  1. 3. a type of wave that an earthquake makes: p-waves
  2. 4. a person who study's earthquakes
  3. 7. primary wave
  4. 8. a wave that an earth quake produces
Down
  1. 1. a type of wave that an earthquake makes: s-waves
  2. 2. a distructive natural disaster that shakes the earth
  3. 5. secondary wave
  4. 6. a tool used to measure earthquakes