Across
- 6. When molten rock erupts on earths surface is called what?
- 9. The mountain ranges in the middle of the ocean
- 10. the circulation of material caused be differences in temperature and density
- 12. The cold and rigid outermost rock layer is called the
- 13. as a slab sinks, it pulls on the rest of the plate with a force called
- 15. a suggestion that continents move
- 16. a metal mined for a profit
- 17. a rare and attractive mineral
- 18. states that Earth's surface is made of rigid slabs of rocks
- 19. The resistance of what being scratched
- 20. a huge super continent
Down
- 1. The denser plate sinks below the more buoyant plate is a process called
- 2. a state of which magnetized objects will orient themselves
- 3. This process forms new oceanic crust
- 4. forms where two plates separate
- 5. forms where tow plates collide
- 7. forms where two plates slide past each other
- 8. a state that magnetized objects would reverse direction and orient themselves
- 11. the magnetic field reverses direction
- 14. rising mantle material at mid-ocean ridges create the potential for plates to move away from the ridge with a force called