Plate tectonics crossword puzzle

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Across
  1. 3. rate magnitude of small earthquake's size
  2. 5. instrument that records an earthquake's seismic waves
  3. 10. a fault zone where two blocks of land move horizontally rather than vertically along a fault plane
  4. 12. a dip-slip fault in which the block above the fault has moved downward relative to the block below
  5. 13. a number based on the earthquake's size
  6. 14. a sudden and violent shaking of the ground
  7. 15. a fault in which the rock above the fault plane is displaced upward relative to the rock below the fault plane
  8. 20. rate total energy a earthquake releases
Down
  1. 1. plates come together
  2. 2. record of an earthquake's seismic waves produced by a seismograph
  3. 4. point directly above the focus
  4. 6. seismic waves that vibrate side to side or up and down
  5. 7. rates amount of shaking from an earthquake
  6. 8. seismic waves that expand like an accordian
  7. 9. large area of flat land
  8. 11. plates pull apart
  9. 16. slow but can produce severe ground movements
  10. 17. area of rock that begins to break or move
  11. 18. mountain that forms when magma reaches the surface
  12. 19. plates slip past each other