animal classification

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Across
  1. 6. group
  2. 7. have this kind of skin
  3. 9. that have hair or fur
  4. 11. animals belong to the animal ___
  5. 13. separate into groups
  6. 14. word for column
  7. 15. that have scales
Down
  1. 1. opposite of vertebrate
  2. 2. use these to breathe underwater
  3. 3. that are cold blooded
  4. 4. your head is your
  5. 5. that have feathers
  6. 8. human
  7. 10. be awake at night
  8. 12. that have rough skin