Across
- 4. The lighter crust that makes up the continents.
- 7. Melted into a liquid.
- 8. The hot center of the Earth.
- 10. The heavier crust that makes up the ocean floor.
- 13. The remains of something that was destroyed.
- 14. An explosion from beneath the Earth's surface.
Down
- 1. The simplest organisms that carry out all basic life activities.
- 2. A system that provides everything needed to stay alive.
- 3. A piece of rock that hits the surface of a planet or moon after traveling through space
- 5. The layer of the earth that surrounds the core.
- 6. Poisonous
- 9. An opening in the earth that lets out gases and other materials.
- 11. A ball of ice, rock, frozen gases, and dust that orbits the sun.
- 12. The outer layer of the Earth.