Crossword
Across
- 3. color
- 4. gases
- 5. freezing
- 7. change
- 9. cooking
- 10. cracking
- 12. crush
- 14. cut
- 16. breaking
- 17. production
- 19. bubbles
- 20. chemical
Down
- 1. boil
- 2. tearing
- 6. rusting
- 8. matter
- 11. sharpening
- 13. dissolving
- 15. temperature
- 18. odor