Plate Tectonics

3. the direct transfer of energy through space by electromagnetic waves
5. a large stream of moving water that flows through the oceans
7. a rigid layer made up of the uppermost part of the mantle and the crust
9. a usually light-colored rock that is found in continental crust
10. the theory that pieces of Earth's lithosphere are in constant motion, driven by continental currents in the mantle
11. the process by which molten material adds new oceanic crust to the ocean floor
14. a dark, dense, igneous rock with a fine texture, found in oceanic crust
15. the amount of mass of a substance in a given volume; mass per unit volume
16. a plate boundary where two plates move past each other in opposite directions
19. the direct transfer of thermal energy from one substance to another substance that it's touching
20. the layer of hot, solid material between Earth's surface and core

1. the hypothesis that the continent slowly move across Earth's surface
2. a plate boundary where two plates move away
4. the force exerted on a surface divided by the total area over which the force is exerted
5. a plate boundary where two plates move toward each other
6. Vibrations that travel through Earth carrying the energy released during an earthquacke
8. the soft layer of the mantle on which the lithosphere floats
12. a break or crack in Earth's lithosphere along which the rocks move
13. the name of the single landmass that broke apart 200 million years ago and broke into today's continents
17. a well-tested concept that explains a wide range of observations
18. the layer of rock that forms Earth's outer surface