Crossword

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

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