2. How do we classify vertebrates? Know that living things are different but have similar characteristics

3. Characteristics of Animals  Multicellular  Cannot make their own food  Move on their own

4. Vertebrates-Animals with backbones  Mammals  Reptiles  Birds  Amphibians  Fish

5. Mammals  Breath air with lungs  Warm-blooded  Covered with hair or fur  Make milk for young

6. Reptiles  Covered with scales  Cold-blooded  Most lay eggs  Do not feed young

7. Birds  Covered with feathers  Warm-blooded  Lay eggs  Feed young

8. Amphibians  Soft skin  Cold-blooded  Hatch from eggs but look different than adults  Do not feed young

9. Fish  Breath oxygen through gills  Covered with scales  Cold-blooded  Most lay eggs  Do not feed young

10. Fossils  Scientists compared ancient animal bones to living species  They shared some characteristics with lizards, like backbones, scales, and four legs  Some were bird-like with feathers and a wishbone  They called them dinosaurs