Across
- 4. these are all over fish and snakes
- 6. the outside layer of an animal
- 8. birds use these to fly
- 9. birds have these
- 12. fish use these to breathe
- 13. snakes do not have these
Down
- 1. these animals have hair or fur
- 2. can live on land or in water but need to stay wet
- 3. these animals have wings
- 5. these animals live on land and have scales
- 7. they live under water
- 9. most mammals have this type of hair on their bodies
- 10. birds, fish, and amphibians all lay these
- 11. birds can do this, but fish can not