Puzzle

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Across
  1. 2. direction of the pyramid of energy
  2. 6. Omnivores are one type of
  3. 8. causes skin cancer
  4. 10. man-made ecosystem
  5. 11. decomposer
Down
  1. 1. the various components of an ecosystem are
  2. 3. responsible for ozone layer depletion
  3. 4. poisonous gas
  4. 5. maximum energy contain
  5. 7. the ultimate source of energy in the ecosystem
  6. 9. biodegradable wastes