Continental Drift Theory and Seafloor Spreading

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