Avi's Earth Layers and Plate tectonics vocab.

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Across
  1. 5. First man that had an idea of continental drift.
  2. 8. The reason for new land in the Mid-ocean ridges.
  3. 9. when two continental crust converge.
  4. 12. lava The ending of when dark basaltic lava soldifies.
  5. 14. How the lithosphere is described as.
  6. 15. Study of earths magnetic polarity.
  7. 16. core The most liquid layer.
  8. 18. What theory says continents move over time.
  9. 19. What boundary moves away from each other.
  10. 22. What boundary causes mountains, trenches, and volcanic island arcs.
  11. 23. Layer that is thicker then the oceanic crust but less dense.
  12. 24. Layer that is thinner but more dense than the continental crust.
  13. 25. Layer made up of some of the crust and mantle that holds up the oceans and continents.
Down
  1. 1. Which boundary slides past each other.
  2. 2. Which woman sketched out the Atlantic.
  3. 3. Which layer makes up 84% of the earths mass.
  4. 4. A semiliquid mechanical layer under the lithosphere.
  5. 6. The cause of a transform boundary.
  6. 7. The thinnest compositional layer.
  7. 10. When the magnetic field flips.
  8. 11. The cause of a divergent boundary.
  9. 13. The rock that makes up the oceanic crust.
  10. 17. A dropped area where a divergent boundary once was.
  11. 20. What rock is the continental crust made up of.
  12. 21. The supercontinent that existed approximately 200 million years ago.
  13. 23. currents Creates tension in the mantle that pulls apart plates in the ocean basin.