Photosynthesis/Cellular Respiration and Succession

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Across
  1. 1. energy
  2. 6. a byproduct of cellular respiration
  3. 8. purpose of cellular respiration
  4. 10. byproduct of photosynthesis
  5. 11. stage where an ecosystem is back to full health. Big trees and animals
  6. 12. organisms that undergo photosynthesis
  7. 13. needed for photosynthesis to occur
  8. 14. lichen are tiny plants that break down rock and turn it into ______________
Down
  1. 2. ecological succession with no soil
  2. 3. purpose of photosynthesis
  3. 4. species that include moss and fireweed
  4. 5. breathing
  5. 7. a forest fire is this type of succession
  6. 9. molecule organisms get their energy from