Plate Tectonics
Across
- 2. the supercontinent that existed millions of years ago
- 5. Current, the driving force of plate tectonics in which hot plastic like material sinks back to the mantle
- 7. breaks in Earth’s crust where rocks have slipped past each other
- 8. a deep valley in a wide area
- 10. any trace of an ancient organism that has been preserved in rock
- 13. part of the ocean floor sinks back into the mantle
- 15. created by two pieces of continental crust converging or coming together
- 17. continents were once joined together in a single landmass andhave slowly moved apart
- 18. can up with PANGEAE
- 19. the boundaries between two plates that are diverging
- 20. older strips or rock move outward from either side of the ridge
Down
- 1. the idea that the Earth’s crust and upper mantle are broken intosections called plates that move around on the mantle
- 3. the boundaries between two plates that are sliding
- 4. caused by plate tectonics
- 6. the crust and part of the upper mantle
- 9. the plastic-like layer below the lithosphere
- 11. all the continents were once joined together in a single landmass
- 12. the boundaries between two plates that are converging
- 14. major tectonic plates in pieces
- 16. ocean floor sinks beneath a deep-ocean trench and back into themantle again