| A | B |
|---|
| amphibian | an animal that begins life in water and moves to land. |
| bird | animal that has feathers, wings, and two legs |
| fish | animal that lives in water |
| gills | helps an animal breathe in water |
| mammal | animal that has fur or hair |
| reptile | animal with dry skin and lives on land |
| scales | help protect a fish |
| extinct | dead and gone |
| fossil | evidence that a plant or animal was alive |
| endangered | in danger of dying out |
