Across
- 4. — Dark film that forms on silver
- 5. respiration — Biological oxidation using glucose
- 6. — Ability of a substance to react
- 8. — Rapid oxidation producing heat and light
- 10. — Liquid that some elements react with
- 12. — Type of oxidation in living organisms
- 15. — Substances that vary in reactivity
- 20. — General term for a physical or chemical event
- 21. — Product of iron oxidation
- 22. — What chemical reactions often do
Down
- 1. — Mixture of gases in the atmosphere
- 2. — Process of gaining oxygen
- 3. — Energy released during combustion
- 7. — Chemical process that causes rusting
- 9. dioxide — Gas released during respiration
- 11. oxidation — Very fast oxidation
- 13. — Gas essential for oxidation
- 14. — Sugar used in cellular respiration
- 16. — Visible energy produced during combustion
- 17. — Energy made during respiration
- 18. of Liberty — Famous monument with a green patina
- 19. — Green coating that forms on copper