Across
- 4. 2 plates move together
- 7. hypothesis first proposed in 1960 by harry Hess
- 10. Lava comes out of it
- 11. the rigid outer part of the earth, consisting of the crust and upper mantle.
- 12. luminous envelope of a star from which its light and heat radiate.
- 14. The study of life
- 15. continuous range of underwater volcanoes
- 16. a continuous elevated zone on the floor of major ocean basins
- 17. major landforms are created as a result of Earth's subterranean movements
- 18. relating to the ocean
Down
- 1. big hill
- 2. hypothesis which suggest that all present contents one assisted as a single supercontinent
- 3. narrow elongated depression of sea floor
- 5. boundary in which 2 plates move apart
- 6. earth shakes
- 7. occurs when an oceanic plate runs into a continental plate and slides beneath it.
- 8. supercontinent containing all existing continents
- 9. elevated areas of the sea floor
- 10. chain of volcanic island
- 13. processes that deform earths crust