Across
- 3. insects are ___________ (no backbones)
- 5. a cold-blooded animal with s____, moist skin is an amphibian
- 8. all vertebrates have ________
- 10. a grasshopper is an invertebrate because it has NO _______
- 11. a snake and a frog are classified as _____ and amphibians
- 12. scientists observe an animal with hair and wings, what is this animal
- 13. some, but not all, invertebrates have (backbones, shells, feathers)
Down
- 1. animals without backbones are called __________________
- 2. vertebrates that are distinguished by live birth, presence of hair or fur, and produce milk for their babies
- 4. which animals are cold-blooded, live part of their lives in water and part on land
- 5. the skin of a reptile is covered with ______
- 6. a rabbit is a __________
- 7. a lizard is a ____________
- 9. amphibians and ________ have a backbone and lays eggs