Across
- 6. 1% of the earth
- 8. Upper mantle and crust'
- 11. made of liquid iron and nickel
- 12. hardness, fatigue, elasticity, toughness
- 13. oceanic and continental crust
- 15. denser and weaker, below the lithospheric mantle
- 16. oceanic plate goes below because it is denser
- 17. idea by Harry Hess
- 18. also known as a constructive boundary
Down
- 1. to explain plate tectonics
- 2. pressing something together
- 3. between the thermosphere and stratosphere
- 4. thickest layer
- 5. crack in the earth
- 6. idea by Alfred Wegner
- 7. plates slide past each other
- 9. 7 major and 8 minor
- 10. also known as a destructive boundary
- 14. a hot dense ball made of mostly iron