SEMESTER TEST

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Across
  1. 5. organism that eats both plants and animals
  2. 10. largest population that an environment can support at any time
  3. 12. part of Earth where life exists
  4. 13. all populations that live in the same habitat
  5. 14. best teacher
  6. 17. sit and cover eggs to keep warm until they hatch
  7. 19. study of interactions of living things and environment
  8. 20. describes living factors in the environment
Down
  1. 1. organism that eats plants
  2. 2. mammal that lays eggs
  3. 3. period of time between fertilization and birth
  4. 4. muscle in lower ribs that helps in respiration
  5. 6. community of organisms and their abiotic environment
  6. 7. describes non-living things in the environment
  7. 8. a female gland that secretes milk
  8. 9. organism that eats animals
  9. 11. one of most external feathers that help determine shape
  10. 15. soft feather that covers body of young birds,
  11. 16. upward force on an object that moves in a fluid
  12. 18. group of organisms of same species living together