Across
- 1. what crust is thicker?
- 4. how many layers are in earth?
- 7. what is the biggest layer?
- 10. what plates slide alongside each other?
- 11. what is the only liquid layer?
- 13. what layer in the mantle is made up of covectional currents?
- 15. what forms if two continental plates collide?
Down
- 2. what was the name of the person who created the theory of continental drift?
- 3. what plate moves toward each other?
- 5. what is the name of the super continent?
- 6. what layer in the mantle is made up of broken rocks?
- 8. who created the theory of sea floor spreading?
- 9. what plate moves away from each other?
- 12. what is the thinnest crust?
- 14. how many million years ago was Pangaea formed?