This animal lives in water, breathes with gills, and has fins. But it lays many eggs without shells., Fish, I can live on and in water. When I’m young, I breathe with gills. When I grow up, I breathe with lungs and my skin. Who am I?, Amphibian, My body is covered with dry scales. I don’t like cold weather because my body gets slow. Which group do I belong to?, Reptile, I have a beak but no teeth. I lay eggs with hard shells. I’m warm even on a cold day. What am I?, Bird, I have hair or fur, I gave birth to live babies and feed them milk. Which vertebrate class is that?, Mammal, Two animals both live in water — a goldfish and a frog. Are they from the same class of vertebrates? Why or why not?, Fish stay in water and breathe with gills. Frogs are amphibians — they can also live on land and breathe with lungs., I have feathers but I cannot fly. I’m very fast on land and lay eggs. Who am I?, Ostrich, A lizard and a dog both have lungs and legs. Why are they different classes of vertebrates?, Lizard (reptile) has scales and lay eggs, while Dog (mammal) has fur and gives birth to live young , A penguin has feathers and lay eggs but cannot fly. Why do you think it still belongs to the bird group?, It has feathers, and lays hard-shelled eggs, all bird features, even if it doesn’t fly, A baby whale drinks milk and breathes air. Why is this important for deciding what class it belongs to?, Only mammals feed milk and breathe air — that makes whales mammals, not fish..

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