Across
- 4. an area created when cooler, denser fluid material sinks and the warmer, less dense fluid material rises to the surface
- 5. the idea that Earth's lithosphere is broken into several large pieces of land that move around Earth's convecting asthenosphere
- 7. occur when plates slide and grind past one another along a fracture in the lithosphere
- 8. the amount of force exerted per unit area of a surface
- 9. an undersea mountain chain where new ocean floor is produced
Down
- 1. a boundary where one denser plate collides and sinks under less dense crust
- 2. enormous moving pieces of the Earth's lithosphere
- 3. 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
- 6. theory that new seafloor is formed at a divergent plate boundary, when magma is forced upward toward the surface at a mid-ocean ridge
- 9. molten rock beneath Earth's surface