Across
- 3. discovered sea floor spreading
- 4. reveals rock of the same geological age
- 5. seafloor mountain created by divergent boundaries
- 7. created by convergent boundaries
- 8. tectonic plates that lie under surface kind mass
- 12. moving or dropping off of sediment
- 15. The plates collide
- 16. The plates slide
- 19. giant super-continent 200 million years ago
- 20. creates volcanoes and trenches
Down
- 1. Cold rises and hot sinks
- 2. map of earth taken from space
- 6. tectonic plates that are at the bottom of the ocean
- 9. created continetial drift theory
- 10. removing or transportation of sediment
- 11. breaking down of sediment
- 13. The plates divide
- 14. theory that all continents were once connected
- 17. long crack in the surface
- 18. shows elevation