Across
- 2. Containing all of the existing continents
- 6. Intermediate sized plates
- 9. a boundary which two plates move together
- 11. earths outer shell consists of individual
- 13. Is broken into about 24 segments
- 14. There is evidence of a glacial period
- 15. A narrow, elongated depression of the seafloor
Down
- 1. First propped in the 1960s by Harry Hess
- 3. Elevated areas of the seafloor
- 4. two plates move apart
- 5. a boundary in which two plates slide past
- 7. Processes that deform earths crust
- 8. All present continents once existed
- 10. Same fossil organism is found only on landmass
- 12. German meteorologist and geophysicist