Across
- 2. thinner portion of the crust
- 4. element that makes up most of the core
- 7. where two or more plates move away from each other
- 8. study of the earth's structure
- 10. partially molten layer of of rock on the upper mantle
- 14. sudden shaking of the ground from movements within the earth's crust
- 15. outer solid layer of earth
- 17. rigid outermost shell of a planet
- 18. portion of core that is solid
Down
- 1. mid-ocean ________ is an underwater mountain range
- 2. portion of core that is liquid
- 3. boundary where two or more lithospheric plates collide
- 5. thicker portion of the crust
- 6. molten or semi-molten material found beneath the earth's surface
- 9. super-continent where all continents are together
- 11. one plate moving over another
- 12. break in the earth's crust
- 13. thickest layer of the earth
- 16. vibrations of earth and it's crust