Plate Tectonic Project

5. The soft layer of the mantle on which the lithosphere floats.
6. The transfer of heat by movement of a fluid.
7. The amount of mass in a given space; mass per unit volume.
9. The surface of land broken up into parts.
10. A plate boundary where two plates move away from each other.
14. A dark, dense, igneous rock with a fine texture, found in oceanic crust.
15. A device that determines the distance of an object under water by recording echoes of sound waves.
16. Vibrations that travel through Earth carrying the energy released during an earthquake.
17. The transfer of energy through space.
19. The layer of hot, solid material between Earth’s crust and core.
20. A break in Earth’s crust where masses of rock slip past each other

1. A rigid layer made up of the uppermost part of the mantle and the crust.
2. The theory that pieces of Earth_tm)s lithosphere are in constant motion, driven by convection currents in the mantle.
3. A plate boundary where two plates move toward each other.
4. The layer of rock that forms Earth’s outer surface.
8. The force exerted on a surface divided by the area over which the force is exerted.
11. A dense sphere of solid iron and nickel at the center of Earth.
12. The shaking that results from the movement of rock beneath Earth’s surface.
13. A usually light-colored igneous rock that is found in continental crust.
18. A layer of molten iron and nickel that surrounds the inner core of Earth.