Across
- 2. outer surface
- 5. the lithosphere and the asthenosphere
- 7. the super continent
- 9. oceanic crust to the ocean floor
- 10. Wegener
- 12. of plate tectonics
- 13. the boundary with each other, moving it in different directions
- 16. lithosphere are in motion,driven by convection currents in the mantle
- 18. zone back into the mantle at a convergent plate boundary
- 20. currents
- 21. plates move apart
- 22. Scientist who developed the Theory of the Continental Drift in 1912.
- 23. core surrounds the inner core of the Earth
- 25. core material at the center of the Earth
Down
- 1. ridge The undersea mountain floor is produced; a divergent plate boundary
- 3. mantle on which the lithosphere floats
- 4. process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary
- 6. spreading
- 8. boundary two plates move toward each other
- 11. of the mantle and the crust
- 14. earth's lithosphere along which rocks move
- 15. canyon on the ocean floor
- 17. two layers - the lithosphere and the asthenosphere
- 19. drift continents were once one huge land mass but have since then drifted apart
- 24. valley