Across
- 3. how plates move and interact with each other
- 5. contains the crust and upper mantle
- 8. 1 percent of the earth is covered by this; the thinnest layer of the earth
- 10. liquid part of core
- 11. discovered by alfred wegener
- 12. pressing something into a smaller space
- 13. largest layer; part of mantle
- 15. what something is made up of
- 16. when two plates come apart from each other
- 18. when two plates come together
- 19. a convergent boundary where one plate slides under the other or subducts
Down
- 1. theory that the plates are moving due to convection currents
- 2. plates that move due to convection currents
- 4. most of upper mantle
- 6. solid part of core made of iron and nickel
- 7. fracture of zone of fractures in the earths crust at a plate boundary
- 8. ball shaped part at the center of the earth; split into two parts
- 9. when two plates slide past each other; can cause fault lines or earthquakes
- 14. discovered by harry hess
- 17. thickest part of the earth