Across
- 2. makes loud firewood crackles
- 3. hottest flame color
- 5. burning
- 7. non living part of ecosystem
- 8. we breathe it
- 10. required to start a fire
- 11. what burns in a fire
Down
- 1. produced from oxidation
- 4. reaction that produces energy
- 6. living part of ecosystem
- 9. the study of organisms and the environment they live in