Lesson 2 Review

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