Across
- 4. All continents were once part of one continent
- 5. when the new oceanic crust forms along the mid-ocean ridge and old crust moves away
- 6. mountain ranges in the middle of the ocean
- 8. when the magnetic field reverses direction
- 10. cold and rigid outermost rock layer
- 11. two plates separating
- 12. when two plates slide past eachother
- 13. denser plate descends into earth's plate boundary
Down
- 1. when magnetized object point north
- 2. when two plate collide
- 3. when magnetized object reverse and point south
- 7. slabs of rock or plates
- 9. all continents are in constant motion