Layers of Earth, Drift, Seafloor Spread

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Across
  1. 4. Method of heat transfer that creates circular currents driven by differences in density
  2. 6. Made of solid Iron and nickle
  3. 9. Old crust is recycled in one of these
  4. 13. _____ data is used by scientists to "see" inside the Earth
  5. 14. The _________ crust is the least dense layer (what we live on top of)
  6. 15. technology used to map the sea floor during WWII
  7. 16. rocky outer part of Earth (includes crust and the upper mantle)
Down
  1. 1. Scientist who proposed continental drift
  2. 2. Hot, dense rock layer between the crust and outer core
  3. 3. The boundary between the crust and the mantle
  4. 5. Continental drift theory was rejected by mainstream science because it was missing a _________
  5. 6. ______ inside new rock points to the magnetic north of the Earth
  6. 7. The only liquid layer of the Earth (creates the magnetic field).
  7. 8. Continental ______= the theory that the continents were once together as one supercontinent
  8. 10. Scientist who discovered seafloor spreading
  9. 11. The _________ crust is thinner than the continental crust
  10. 12. _______ evidence shows that we find the same species of plants and animals on different continents
  11. 17. New sea floor is created here