Across
- 1. solid to a gas
- 3. particles moving closer together
- 5. liquid to a solid
- 9. the study of space
- 10. the biggest planet in the solar system
- 11. how many inner planets are there?
- 12. the more the ---- the heavier
- 16. the weight of something
- 17. what all matter is made of
- 18. how many planets are in the solar system?
- 19. gas to a liquid
Down
- 1. particles stay in a fixed shape
- 2. liquid to a gas
- 4. the study of earth/rocks
- 6. what planet is third from the sun
- 7. particles can move completely free
- 8. how many dwarf planets are there?
- 12. gas to a solid
- 13. what is the sun
- 14. solid to a liquid
- 15. smallest planet