Mammals: have hair or fur, give birth to live young, feed babies with mother's milk, have

baby teeth that fall out before adult teeth come in, warm-blooded, have 3 middle ear

bones

Fish: most are cold-blooded (though tuna, swordfish and some shark

species are warm-blooded), live in water, lay eggs, have scales, have

fins, breathe using gills

Birds: most can fly (ostriches and penguins cannot), have wings and

feathers, lay eggs, have hollow bones, warm-blooded -

Amphibians: cold-blooded, live in the water AND on land, do not have

scales, have permeable skin (molecules and gases can pass

through), have gills for at least part of their lives, have moist skin, have

webbed feet -

Reptiles: have scales, breathe with lungs, most lay eggs (boa constrictor gives birth to live young), most are cold-blooded (sea turtle is warm-

blooded), have dry skin

Sort these animals!Amphibians Mammals Reptiles Birds Fish

Classify These Characteristics

Amphibians Mammals Reptiles Birds Fish

Has scales Lay eggsCold blooded

Lives in water and on landGives birth

to live young

Breathe using gills

Has hair or fur

Feed babies with mother’s milk

Cold blooded

Has feathers

Lay eggs

Hollow boned

Warm blooded