Earths interior and continental drift

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Across
  1. 4. hypothesis that our continents were once connected
  2. 5. name of the supercontinent proposed by continental drift
  3. 8. the densest compositional layer
  4. 9. strong layer between Asthenosphere and outer core
  5. 11. process when the magnetic poles switch
  6. 13. process where new oceanic lithosphere forms
  7. 15. geologist that discovered sea floor spreading
  8. 16. based on the physical properties of the layer
  9. 17. based on chemical make up of the layer
  10. 19. The layer of earth in between the crust and core
  11. 20. movement of fluid in the mantle that drives tectonic plates
Down
  1. 1. solid ridged outermost physical layer
  2. 2. The solid center of earth made mostly of nickle
  3. 3. slabs of crust that move on top of the asthenosphere
  4. 6. proposed the idea of continental drift and found evidence
  5. 7. the liquid layer in earths interior
  6. 10. Earth's outermost compositional layer
  7. 12. process where gravity pulls denser materials toward the center
  8. 14. vibrations through the earth caused by earthquakes
  9. 18. The viscous layer in the upper mantle where the lithosphere float