Chapter 5 Plate Tectonics
Across
- 2. A well-tested concept that explains a wide range of observations
- 5. A layer of hot, solid rock below the crust and above the core
- 6. The process where lava adds new ocean crust to the ocean floor
- 8. A section of lithosphere that slowly moves over the asthenosphere, carrying pieces of crust.
- 11. A break or crack in Earth’s lithosphere along which the rocks move
- 13. A device that determines the distance of an object under water by recording echoes of sound waves
- 14. The layer of rock that forms Earth’s outer skin
- 15. The theory that pieces of Earth’s lithosphere are in constant motion driven by mantle convection
- 17. The solid iron and nickel layer in the middle of the Earth
- 20. The process where ocean floor sinks beneath a deep-ocean trench into the mantle
- 21. A boundary where two plates move towards each other
- 23. A boundary where two plates move away from each other
- 24. A deep valley where two plates move apart
- 25. The transfer of energy through space
Down
- 1. The soft layer of rock in the mantle
- 3. Flow which transfers heat within a fluid
- 4. The transfer of heat by the movement of fluid currents
- 7. A deep valley where ocean crust sinks toward the mantel
- 9. Very hard rock which forms the top layer of the mantle and the crust
- 10. Core- The only liquid layer in the earth, made of iron and nickel
- 12. The theory that all continents were once joined together and have since drifted apart.
- 16. The transfer of heat between touching material
- 18. A boundary where two plates move past each other in opposite direction
- 19. An undersea mountain chain where new ocean floor is made
- 22. The name of the single landmass that broke apart 200 million years ago and made today’s continents