Plate Tectonics

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Across
  1. 1. slowest moving waves
  2. 3. the theory that proposes that Earths outer shell consist of individual plates that interact in various ways
  3. 6. how many types of surface waves
  4. 8. the amount of layers Earth is made up of
  5. 9. areas of low earthquake activity
  6. 12. the lateral movement of continents resulting from the motion of crustal plates
  7. 13. caused by a sudden release of energy when rocks move along a fault.
  8. 16. measures ground motion and can be used to determine determine the distance seismic waves travel
  9. 18. spot on surface above the focus
  10. 19. fastest waves that travel through liquids or gases
  11. 20. a long high sea wave caused by an earthquake
Down
  1. 2. location of first motion in Earth
  2. 4. what plates are made of
  3. 5. the strength of an earthquake
  4. 7. slower waves that travel through solids only
  5. 10. areas where no body waves are detected
  6. 11. refers to the deformation of the crust as a consequence of plate interaction
  7. 14. where plates slide past each other
  8. 15. small earthquakes that precede a large earthquake
  9. 17. the layer of earth we live on