Across
- 3. a deep depression of the sea floor caused by the subduction of one plate under another
- 6. zones, where plates slide under another plate
- 8. beneath lithosphere, "plastic mantle; higher temperature and pressures
- 10. plates that separate
- 11. boundary, the point where two plates meet
- 12. spreading, when divergent plates beneath the ocean waters move apart to make new seafloor
- 13. the name of all the continents together as one
- 14. plates that slide past one another
- 16. the ridges made by the plates; on land
- 17. Wegner, who came up with the theory that the continents were once together
- 18. layer of Earth that is the only liquid layer
- 19. zones, an area in the middle of a continental plate where the plate is beginning to separate
Down
- 1. a crack in the Earth's crust where rocks slide past one another
- 2. made from crust and upper mantle; rigid plates and low temperatures
- 4. the name for a land plate
- 5. colliding plates
- 7. drift, the difference densities of the mantle (warm and cool) that rise and sink causing a circular motion
- 9. a plate that is under a large body of water
- 15. ridges, underwater mountain ranges where the crust is spreading apart creating new ocean floor