Across
- 5. Earth's longest mountain range
- 9. Causes convection currents
- 13. Type of boundary where plates move apart
- 14. Plates are moved by convection currents
- 15. Deepest part of the ocean
- 17. Causes seafloor spreading
- 19. Discovered seafloor spreading
- 20. Type of boundary where plates move together
Down
- 1. evidence in rock layers across continents
- 2. Was initially rejected due to lack of evidence
- 3. Giant landmass from 250 million years ago
- 4. Can form at convergent or divergent boundaries
- 6. Theory Earth used to be one landmass called Pangaea
- 7. Lithosphere is ___ plates
- 8. Earth's core is comprised of
- 10. Comprised of crust and upper mantle
- 11. A less dense plate gets pushed under another plate
- 12. Type of boundary where plates slide past each other
- 16. Wegener compared them from continent to continent
- 18. Created Continental Drift Theory