Vertebrates

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Across
  1. 2. soft covering that helps birds fly and stay warm
  2. 3. the natural place where an animal lives
  3. 6. birth when animals have babies that are born instead of hatching
  4. 7. body parts that fish use to breathe in water
  5. 10. body parts used to breathe air
  6. 12. blooded body temperature changes with the environment
  7. 13. cold blooded animal with dry scaly skin
  8. 16. all the bones that support the body
  9. 17. round or oval objects that some animals lay to have babies
  10. 18. warm blooded animal with feathers that lays eggs
  11. 20. warm blooded animal with fur or hair that feeds milk to its babies
Down
  1. 1. animal with a backbone
  2. 4. animal that can live on land and in water
  3. 5. small hard plates that cover the skin of reptiles and fish
  4. 8. the line of bones down the middle of the back
  5. 9. thick hair that covers the body of many mammals
  6. 11. a group of similar animals that can have babies together
  7. 14. animal without a backbone
  8. 15. cold blooded animal that lives in water and breathes through gills
  9. 19. blooded keeps the same body temperature all the time