Biology Quiz Crossword

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Across
  1. 4. The co-operation of organisms in a symbiotic relationship
  2. 6. An organism that can produce its own energy
  3. 7. What happens in an environment after a major disaster
  4. 8. The total organic matter of organisms in an area
  5. 9. all life in ecosystems on earth
  6. 11. The study of the environment
  7. 12. An animals role in its environment
  8. 14. A foreign species that takes over an environment
  9. 15. Chemical concentrations growing as the trophic level increases
  10. 16. Leaving one's environment
  11. 17. The overall weather in an area
  12. 19. Joining another's environment
  13. 20. Active during the day
Down
  1. 1. A animal eats dead organisms to decompose them
  2. 2. The natural occurrence of ammonia turning into nitrogen
  3. 3. The theoretical max population of an area
  4. 5. How well an ecosystem can sustain itself
  5. 10. Contaminants in an environment
  6. 13. The amount of species
  7. 18. The study of human populations