Tectonic Crossword
Across
- 3. A deep valley that forms when plates move apart
- 4. occurs when two plates collide
- 7. pieces of the earth's lithosphere are in slow motion
- 9. When two plates move apart
- 10. mountain range underwater
- 12. areas where large numbers of active volcanoes
- 13. Ridge a divergent boundary on the Atlantic floor
- 15. mountains rising from oceanic floor
- 17. the idea that all of the continents were joined together
- 18. cracks in the earth's crust
- 19. A deep canyon in the oceanic floor
- 20. plates move away from each other
Down
- 1. plates grind past each other
- 2. plates move toward each other
- 5. oceanic crust is created underwater
- 6. to break off
- 8. movement of a fluid
- 11. a plate diving under another plate
- 14. quality of being easily shaped or formed
- 16. stated theory's of plate tectonics and continental drift