Across
- 2. The brightness of a star; amount of energy a star gives off
- 4. The gases around a planet or star
- 6. To come together, to connect
- 8. The very center or middle of something
- 9. Things that describe something or make it different
- 10. fusion When smaller atoms connect to make larger atoms and give off energy
Down
- 1. the parts that make something
- 3. the beginning, middle, and end of life
- 4. to take in or soak up
- 5. A material made from only one type of atom
- 7. The smallest type of star
- 11. The smallest part of matter