puzzle

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Across
  1. 1. - group of different organisms living in same place
  2. 4. - group of same organisms living in same place
  3. 5. - animals that eat plants
  4. 6. factor - non-living part of an ecosystem
  5. 9. factor - living part of an ecosystem
  6. 12. - change in population of one organism
  7. 14. - naming system used by scientists
  8. 16. - animals that eat meat
  9. 18. - variable that changes in experiment
  10. 19. - key used to identify organisms
  11. 20. - all living things and the environment
Down
  1. 1. - putting living organisms into groups
  2. 2. - plants that produce flowers
  3. 3. - variable measured in experiment
  4. 7. - very big group of classification
  5. 8. - organisms without a backbone
  6. 10. - variable that is kept the same in an experiment
  7. 11. - organisms with a backbone
  8. 13. - animals that eat both plants and animals
  9. 15. - smallest group of classification
  10. 17. - a living thing