Science vocab

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Across
  1. 4. the bones of a once living organism
  2. 6. an animal only eating meat
  3. 8. the place in which the animal lives
  4. 11. the joining of egg and sperm
  5. 12. an animal that does not make body heat
  6. 13. the organ that helps with breathing
  7. 14. an internal skeleton
  8. 16. the organ that stabilizes the fish at depths
  9. 17. an animal only eating plats
  10. 20. the early form of a frog
Down
  1. 1. a tissue more flexible than bone
  2. 2. a cold-blooded vertebrate animal
  3. 3. an animal that makes body heat
  4. 5. ____________ rock
  5. 7. the little bones that make a backbone
  6. 9. the upper part of the heart to take blood
  7. 10. the person who studies bones
  8. 15. a hollow part or cavity in an organ.
  9. 18. each of the small plates to protect the
  10. 19. _________ circulatory system