Continental Drift Theory and Seafloor Spreading

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Across
  1. 3. The same _____ have been found across continents.
  2. 6. Since she was a _______, she was not allowed to go out onto boats to conduct research
  3. 7. Using sound waves, Marie Tharp began to map out the _____ ______.
  4. 10. A geologic process in which tectonic plates—large slabs of Earth's lithosphere—split apart from each other.
  5. 12. Seafloor spreading occurs at ________ plate boundaries.
  6. 13. A group of linked ideas intended to explain something.
  7. 15. The new seafloor is being __________ at the Mid Ocean Ridge.
  8. 16. Pangea existed _______ of years ago.
  9. 17. Mountain ranges end abruptly on one ________ and pick back up on another.
  10. 19. What did they find at the bottom of the ocean?
Down
  1. 1. It is the longest mountain range in the world.
  2. 2. All of the continents seem to fit together like a _____.
  3. 4. The _____ seafloor is getting pushed out towards the continents.
  4. 5. Supercontinent made of ALL continents
  5. 8. The theory that the continents slowly move over time.
  6. 9. Alfred ___ theory is called Continental Drift.
  7. 11. The mountain circles the globe and connects all the ___________.
  8. 14. Even the layers of ____ within these mountains match up.
  9. 18. The less-dense material _______, often forming a mountain.