Tectonic Plates

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Across
  1. 3. Discovered Sea-Floor-Spreading
  2. 5. Huge lithosphere pieces that move on the asthenosphere
  3. 8. The rising of hot, less dense fluid, and the falling of cool, more dense fluid
  4. 9. The difference between two lines of elevation on a topographic map
  5. 11. Where an earthquake is most likely to occur
  6. 13. Supercontinent that held the majority of the landmasses on Earth
  7. 15. When two plates collide
  8. 17. When two plates slide together
  9. 18. When one plate goes under another,and creates volcanic islands
  10. 19. The study of Earth's surface, specifically in terms of elevation
  11. 20. Process that transports sediment
Down
  1. 1. Line that connects points with the same elevation on a topographic map
  2. 2. Process that breaks down rocks
  3. 4. The dropping of sediment to a new place
  4. 6. A map that shows the shape and elevation of a surface using contour lines
  5. 7. When two plates divide
  6. 10. Created Plate Tectonic Theory
  7. 12. A natural feature of the Earth
  8. 14. Distance above sea level
  9. 16. Created Continental Drift Theory