biology revision

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Across
  1. 2. biological material
  2. 5. energy level in a food chain
  3. 7. uses carbon dioxide and sun energy
  4. 8. creates food by photosynthesis
Down
  1. 1. burning releases energy and carbon
  2. 3. decays dead organic matter
  3. 4. organism releases carbon and energy
  4. 6. eats other organisms