Across
- 4. Enormous moving pieces of the Earth's lithosphere.
- 5. The idea that Earth's lithosphere is broken into several large pieces of land that move around on Earth's convecting asthenosphere.
- 6. Molten rock beneath the Earth's surface.
- 7. A boundary where one plate-usually made of dense, oceanic crust-collides and sinks under less dense crust.
- 8. Theory that new seafloor is formed at a divergent plate boundary, when magma is forced upward toward the surface at a mid-ocean ridge.
- 10. An undersea mountain chain where new ocean floor is produced; a devergent plate boundary.
Down
- 1. A navigational system involving satellites and computers that can determine the latitude and longitude of a receiver on Earth by computing the time difference for signals from different satellites to reach the receiver.
- 2. An area created when cooler, denser fluid material sinks and the warmer, less dense fluid material rises to the surface.
- 3. Occur when plates slide and grind past one another along a fracture in the lithosphere.
- 9. The amount of force exerted per unit area of a surface.