science OA

2. occurs and the magnetic field reverses direction (2)
6. mountain ranges in the middle of the oceans (2)
7. Fill in the blank: Plate _________
8. Fill in the blank: Continental _____
10. the process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge (2)
13. The name of the theoretical supercontinent
14. as a slab sinks it pulls on the rest of the plate with a force (2)
15. Teacher of 8 grade science
16. Female geologist in the 1960's (2)
19. forms where two plate collide
20. a state in which magnetized objects will orient themselves to point north (2)

1. the circulation of material caused by differences in temperature and density
3. when the denser plate sinks below the more buoyant plate
4. forms where two plates slide past each other (3)
5. forms when two plates seperate (3)
9. father of pangaea (2)
11. a state in which magnetized objects would reverse direction and orient themselves to point south (2)
12. the cold and rigid outermost rock layer
17. rising mantle material in mid-ocean ridges creates the potential for plates to move away from the ridge with a force (2)
18. What lesson is this?