Across
- 7. How hot or cold something is.
- 8. All living things on Earth.
- 10. All water on Earth.
- 11. The thin, rocky outer layer where we live.
- 13. The thickest layer; hot, soft rock that moves slowly.
Down
- 1. The layers of gases surrounding Earth.
- 2. A force that pushes inward because of the weight above.
- 3. All solid parts of Earth.
- 4. A section or part of the Earth.
- 5. A solid ball of metal; the hottest, deepest layer.
- 6. A layer of liquid metal (iron and nickel) that flows.
- 9. When two spheres affect each other.
- 12. Parts that work together as a whole.