Across
- 4. solid layer between earth's crust and core
- 7. transfer of heat by movements of a heated fluid
- 8. transfer of heat by direct contact of particles
- 10. scientist that hypothesized pangea
- 11. soft layer of mantle
- 15. places where two or more plates meet
- 16. a plate boundary where two plates move past each other in opposite directions
- 18. transfer of energy through empty space
- 19. rigid layer from uppermost part of crust
Down
- 1. crust found on earth's continents
- 2. oceanic crust sinks beneath a trench and back into the mantle
- 3. a break in earth's crust where slabs of rock slip past each other
- 5. type of crust found under earth's oceans
- 6. a device that determines object distance under water by sound waves
- 9. a plate boundary where two plates move away from each other
- 12. hypothesis that continents slowly move across earth's surface
- 13. layer of rock that forms earth's outer surface
- 14. theory that pieces of earth's lithosphere are in motion
- 17. section of lithosphere that slowly move over atmosphere
- 20. geologist who discovered sea floor spreading by sonar