Across
- 3. the quality of something that gives off light or shines
- 6. what keeps our planets in orbit
- 8. A scatterplot of stars
- 10. existence
- 12. a statement that hasn't been proven as true
- 13. Heating of the earths surface
- 14. provides light and heat for us on earth
- 15. a star is made of 25% of this element
- 16. orbit around the sun in the solar system
Down
- 1. happened about 13.8 billion years ago
- 2. Long term change in temperature and weather patterns
- 4. giant balls of hot gas
- 5. A push or pull
- 7. the degree or intensity of heat present in something
- 9. a star is made of 75% of this element
- 11. something proven to be true & observed many times