the most difficult scientific crossword ever in a billion years

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Across
  1. 2. nonliving things
  2. 4. hunted by predators
  3. 5. living things
  4. 7. cycle process of nitrogen
  5. 8. cycle process of water
  6. 9. eats both plants and meat
Down
  1. 1. factors decrease the population
  2. 3. meat eater
  3. 4. hunts prey
  4. 6. plant eater