Across
- 2. The relatively thick part of the Earth’s crust that forms the large landmasses, typically less dense and older than oceanic crust.
- 6. A layer of molten iron and nickel that surrounds the inner core of Earth.
- 7. The hypothesis that the continents slowly move across Earth’s surface.
- 10. The layer of rock that forms Earth’s outer surface.
- 12. The soft layer of the mantle on which the lithosphere floats.
- 13. A layer of hot, solid material between Earth’s crust and core.
- 15. The process by which molten material adds new oceanic crust to the ocean floor.
Down
- 1. A dense sphere to solid iron and nickel in the center of the Earth.
- 3. A weak spot in the crust where magma had come to the surface.
- 4. A thin layer of crust that under lies the ocean basins and is usually younger and denser than the continental crust.
- 5. The movement of a fluid, caused by differences in temperature, that transfers heat from one part of a fluid to another.
- 8. A giant wave caused by an earthquake in the ocean floor.
- 9. A break or crack in Earth's lithosphere along which the rocks move.
- 11. The shaking that results from the movement of rock beneath Earth's surface.
- 14. A rigid layer made up of the uppermost part of the mantle and the crust. One of four spheres into which scientists divide Earth.