Extra Credit

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Across
  1. 2. all three types of seismic waves
  2. 3. ridged shell
  3. 5. weak layer of Earth
  4. 13. ocean floor shifts suddenly during an earthquake
  5. 14. a fault to spring back after an earthquake
  6. 17. location of the surface directly above the focus
  7. 18. the point within Earth where an earthquake starts
  8. 19. a solid rocky shell that extends to 2890 km.
  9. 20. thin rocky outer layer of Earth
  10. 21. area along a fault where there hasn't been a earthquake in a long period of time
Down
  1. 1. more precise means of measuring earthquakes
  2. 4. a reference for the amount of ground movement
  3. 6. body waves reach the surface
  4. 7. the vibration of Earth produced by the rapid release of energy
  5. 8. earthquake that happens after the first one
  6. 9. caused by slippage along the break in the lithosphere
  7. 10. boundary that separates the crust and mantle
  8. 11. liquid layer
  9. 12. a sphere having a radius of 1220 km
  10. 15. soil and rock is saturated with water
  11. 16. wave that is similar to when a stone is dropped in a calm pond
  12. 22. shake particles at right angle
  13. 23. compress,or push and expand