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

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

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

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

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

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

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

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

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