Lesson 2 Review

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