Continental Drift Theory and Seafloor Spreading

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