Across
- 2. molten rock found below the crust
- 5. molten rock found above the crust
- 6. the supercontinent making the countries in the northern hemisphere
- 8. the upper part of the mantle that the crust sits on top of
- 10. the centre of the Earth
- 12. the mid-_________ ridge runs along the west coast of America
- 14. ___________ spreading is responsible for forming ocean ridges
- 15. ________ waves are used to take measurements inside the Earth
- 18. the supercontinent made of Gondwana and Laurasia
- 19. this scientist that gave evidence for the mid-atlantic ridge
- 20. the first super =continent
Down
- 1. continental _________ are underwater cliffs
- 3. the branch of science studying the Earth
- 4. contains the semi-solid layer of the Earth
- 7. a person who studies geology
- 9. the theory that the Earth is made of moving plates
- 10. the solid, outer layer of the Earth
- 11. the theory that the continents have moved over time
- 13. the scientist who first proposed continental drift
- 16. ____________ currents move tectonic plates
- 17. the supercontinent making the countries in the southern hemisphere