Plate tectonics
Across
- 5. a layer of molten iron and nickle that surrounds the inner core of earth
- 6. the transfer of heat within a material or between materials that are touching
- 7. a break in the earth's crust where masses of rock slip past each other
- 9. the layer of hot, solid material between earths crust and core
- 11. a plate boundary where two plates move toward each other
- 14. a plate boundary where two plates move away from each other
- 15. the transfer of heat by movement of a fluid
- 16. a plate boundary where two plates move past each other in opposite direction
- 17. a rigid layer made up of the upper most part of the mantle and the crust
- 19. the name of the single land mass that broke apart 200 million years ago and gave rise to today's continents
Down
- 1. the movement of a fluid caused by differences in temperature, that transfers heat from one part of the fluid to another
- 2. the process by which molten material adds new oceanic crust to the ocean floor
- 3. the layer of rock that forms Earth's outer surface
- 4. the hypothesis that the continents slowly move across earth's surface
- 8. a dense sphere of solid iron and nickel at the center of earth
- 10. a undersea mountain chain where new ocean floor is produced; a divergent plate boundary
- 12. the region between the inonosphere and the exosphere
- 13. the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary
- 18. a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust
- 20. the soft layer of mantle on which the lithosphere floats