Plate Tectonics
Across
- 2. a rigid layer made up of the uppermost part of the mantle and the crust
- 5. the soft layer of the mantle on which the lithosphere floats
- 9. a break or crack in Earth's lithosphere along which the rocks move
- 10. the direct transfer of energy through space by electromagnetic waves
- 12. the hypothesis that the continent slowly move across Earth's surface
- 13. the layer of hot, solid material between Earth's surface and core
- 15. a plate boundary where two plates move toward each other
- 16. a plate boundary where two plates move past each other in opposite directions
- 17. a plate boundary where two plates move away
- 18. a well-tested concept that explains a wide range of observations
- 20. the amount of mass of a substance in a given volume; mass per unit volume
- 21. a usually light-colored rock that is found in continental crust
Down
- 1. the theory that pieces of Earth's lithosphere are in constant motion, driven by continental currents in the mantle
- 3. the direct transfer of thermal energy from one substance to another substance that it's touching
- 4. a large stream of moving water that flows through the oceans
- 6. Vibrations that travel through Earth carrying the energy released during an earthquacke
- 7. the force exerted on a surface divided by the total area over which the force is exerted
- 8. a dark, dense, igneous rock with a fine texture, found in oceanic crust
- 11. the name of the single landmass that broke apart 200 million years ago and broke into today's continents
- 14. the process by which molten material adds new oceanic crust to the ocean floor
- 19. the layer of rock that forms Earth's outer surface