Vertebrates

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Across
  1. 4. Hair that covers most mammals.
  2. 6. Animals that live part of their life in water and part on land.
  3. 8. What birds have that helps them fly.
  4. 10. What mammal babies drink from their mothers.
  5. 12. What fish use to breathe underwater.
  6. 13. A small mammal covered in spines.
  7. 15. Cold-blooded animals with scales that lay leathery eggs.
  8. 17. A colorful bird with a large beak.
  9. 19. An animal with a backbone.
  10. 21. Animals with feathers and beaks that hatch from hard-shelled eggs.
  11. 22. Animals whose body temperature changes with their environment.
Down
  1. 1. A big change in body form, like a tadpole turning into a frog.
  2. 2. Animals like jellyfish that are not real fish because they lack a backbone.
  3. 3. What amphibians develop to breathe on land.
  4. 5. Animals that keep a steady body temperature.
  5. 7. The structure that supports your body and runs along your back.
  6. 9. Many vertebrates lay these to have babies.
  7. 11. Animals that live in water, have fins, and breathe with gills.
  8. 14. Another word for cold-blooded.
  9. 16. Hard coverings on reptiles and fish.
  10. 18. Animals that have hair or fur and feed milk to their babies.
  11. 20. Another word for backbone.