plate tectonics

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Across
  1. 2. a system of detection of objects under water
  2. 7. when rock solidifies while lined up with earths magnetic field
  3. 9. violent sacking of the ground
  4. 10. hot fluid within the earths crust
  5. 13. outer part of earth consist of crust and mantle
  6. 15. is where two plates slip sideways next to eachother
  7. 16. center of an earthquake
  8. 17. an elastic wave produced by earthquakes
Down
  1. 1. came up with the theory of seafloor spreading
  2. 2. when two plates collide and one dives under the other
  3. 3. when two plates move away from each-other
  4. 4. a mountain made of cooled magma
  5. 5. the center of earth (really hot)
  6. 6. a volcanic rock
  7. 8. when rocks are slowly pulled apart
  8. 11. the uper layer of earths mantle
  9. 12. when rocks are squashed together
  10. 14. a point on earths surface above the focus of an earthquake