Across
- 5. first continent
- 6. boundary at ocean ridges
- 8. plates do not collide or move away at these boundaries
- 9. this element helps make up the inner core
- 11. magma erupting through the seafloor
- 13. rigid upper part of the outermost layer
- 15. this plate lies west of the Caribbean Sea
- 16. denser crust sinking
- 17. third most abundant element in the crust
- 18. the crust is broken up into many
Down
- 1. these mountains form where the Indian and Eurasian plates meet
- 2. can be found at plate boundaries
- 3. crust made of sima
- 4. thickest layer
- 7. these happen along faults
- 10. this crust is thicker but lighter
- 12. deepest part of the ocean floor
- 14. there are seven of these on our planet