Plate Tectonics

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Across
  1. 2. waves most destructive seismic wave
  2. 3. the vibrations produced by the braking of rock
  3. 7. oundary that comes together
  4. 10. thickest layer of Earth
  5. 11. s wave
  6. 12. the elastic limit is first released
  7. 16. which layer of earth contains the asthenosphere
  8. 17. above the focus
  9. 19. what is the fewest number of seismograph stations needed to find the earthquake epicenter
Down
  1. 1. all land
  2. 2. instrument used to record waves of an earthquake
  3. 4. boundary where earthquakes form
  4. 5. above the asthenosphere
  5. 6. what is at the center of the earth
  6. 8. below the lithosphere
  7. 9. where no seismic waves are received
  8. 13. what's the last name of the scientist that purposed the continental drift theory
  9. 14. how many faults are there
  10. 15. Earths crust and part of the upper mantle
  11. 18. wave fastest seismic wave