Across
- 3. theory that the continents broke apart during jurassic times
- 4. mountain ranges in the middle of oceans
- 6. magnetic fields reverse direction and point geographically south
- 9. Process by which oceanic crust forms along a mid ocean ridge and older oceanic crust moves away from the ridge
- 10. A state in which magnetic objects will orient themselves to point geographically north
- 12. constant motion on the surface of earth
Down
- 1. Deep underwater troughs created by one plate subducting under another plate at a convergent plate boundary
- 2. when magnetic field reverses direction
- 5. A curved line of volcanoes that form a parallel to a plate boundary
- 7. ridges that form where blocks of crust move up or down along faults
- 8. Parallel ridges that form where blocks of crust move up or down along faults
- 11. Made up of layers that are folded