Plate Techtonics

3. The layer of hot,solid material between earth's crust and core.
4. a trace of an ancient organism that has been preserved in rocks.
7. A layer of molten iron and nickle that surrounds the inner core of earth.
8. a device that determines the distance of an object under water by recording echoes of sound waves.
10. an undersea mountains chains where new ocean floor is produced;a divergent plate boundary.
11. the process by witch oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.
15. The soft layer of the mantle on which the lithosphere floats.
17. Waves Vibration that travels through earth carrying the energy released during an earthquake.
18. A dense sphere of solid iron and nickle at the center of the earth.
19. the transfer of energy though space.

1. the transfer of heat within a material or between materials that are touching.
2. A rigid layer made up of the uppermost part of the mantle and the crust.
5. the hypothesis that the continents slowly move across earth surface.
6. The force exerted on a surface divided by the area over which the force is exerted.
9. the transfer of heat by movement of a fluids.
12. A dark dense,igneous rock with a fine texture, found in oceanic crust.
13. The layer of rock that form earth outer surface.
14. A usually light-color igneous rock that is found in continental crust.
16. the name of the single landmass that broke apart 200 million years ago and gave rise to today's continents.
20. the amount of mass in a given space;mass per unit volume.