Across
- 3. Cold, rigid outermost rock layer
- 4. A state in which magnetized objects will orient themselves to point north is called ____ polarity.
- 5. Magnetic ____ occurs when the magnetic field reverses direction.
- 6. Continents fit like pieces of a..
- 8. Denser plate sinks below buoyant plate
- 9. Supercontinent.
Down
- 1. Mountain ranges in the middle of the ocean are called ____ ridges.
- 2. Process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge.
- 7. Circulation of material caused by differences in temperature and density