Across
- 5. The theory that earth is made of giant, moving slabs
- 6. the process that creates new sea floor
- 8. A system of ideas that explains many related observations.
- 9. this prefix means under
Down
- 1. Any movement of matter that results from differences in density
- 2. the hypothesis that the continents were once part of a single land mass.
- 3. the outermost layer on the earth
- 4. The change of the magnetic poles
- 7. One plate's edge being pushed under another plate