Across
- 1. A visible mass of water vapor in the sky.
- 4. A living organism that makes its own food through photosynthesis.
- 6. The planet we live on.
- 9. The vast area beyond Earth's atmosphere.
- 11. The Earth's natural satellite.
Down
- 2. A form of energy that allows us to see.
- 3. A liquid essential for all life.
- 5. The smallest unit of matter.
- 7. The organ that pumps blood throughout the body.
- 8. The ability to do work or cause change.
- 9. A star at the center of our solar system.
- 10. A solid mineral that forms part of the Earth's surface.