Classification of Animals

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Across
  1. 1. How mammals reproduce.
  2. 4. The outer covering of mammals.
  3. 5. Animals whose body temperature changes with the surroundings.
  4. 8. Animals with fur or hair that give birth to young ones.
  5. 9. How birds, fish, reptiles, insects, and amphibians reproduce.
  6. 10. Animals with dry, scaly skin that usually live on land.
  7. 12. Body parts that help fish swim and balance.
  8. 13. Animals that live in water and breathe using gills.
  9. 15. The body part fish use to breathe in water.
  10. 16. Animals that can keep their body temperature constant.
  11. 18. Special fish that can live on land and in water.
  12. 20. This body part helps birds fly.
Down
  1. 2. Animals with feathers and wings; most can fly.
  2. 3. The young of frogs that live in water and breathe using gills.
  3. 4. The outer covering of birds.
  4. 6. The body part mammals, birds, and reptiles use to breathe.
  5. 7. Animals that can live both on land and in water.
  6. 11. The place where an animal lives and gets what it needs to survive.
  7. 14. The outer covering of fish and reptiles.
  8. 17. The outer covering of amphibians.
  9. 19. Small animals with six legs and three body parts.