Earthquakes

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Across
  1. 2. point on fault where earthquake originates
  2. 7. fracture or system of fractures in Earth's crust
  3. 11. point on Earth surface directly above the focus
  4. 12. scale measures the energy released by a quake
  5. 13. measures movement during a quake
  6. 15. the type of fault when plates slide past each other
  7. 17. used evidence to support continental drift
  8. 18. slowest and usually most destructive quake waves
Down
  1. 1. when one plate is forced underneath another
  2. 3. __ waves: vibrations of ground during an earthquake
  3. 4. the major fault in California
  4. 5. fault in which plates move toward each other
  5. 6. wave causes rock to move at right angles to direction of travel(up and down)
  6. 8. fault in which plates move away from each other
  7. 9. plates of crust which float/move upon the mantle
  8. 10. waves that squeeze and push rocks in the direction of travel(back and forth)
  9. 14. deformation of material
  10. 16. force acting upon an area: compression, tension and shear