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