Across
- 2. a group of many solar systems and stars,planets
- 4. the largest planet in are solar system
- 6. negative charge
- 7. the atmosphere we live on
- 8. a pull force
- 9. everything we know of
- 11. is a land that is wet most of the year
- 13. a ball of gas and ice and has a trail
- 16. a ball of gas in are solar system
- 19. water vapor
- 20. positive charge
Down
- 1. spinning in place
- 3. when water falls back on earth
- 5. earths sister planet
- 10. going around
- 12. everything is made up of them
- 14. salt and fresh water mix
- 15. neutral charge
- 17. condensed water vapor
- 18. a natural satellite