| A | B |
|---|
| Invertebrate | An animal without a backbone. |
| Vertebrate | An animal with a backbone. |
| Cold-blooded animal | An animal whose body temperature changes as the outside temperature changes. |
| Warm-blooded animal | An animal whose body temperature stays about the same, even when the outside temperature changes. |
| Fish | Cold-blooded verterbrates that live in water. |
| Fin | Fanlike part on an animals body used to help fish move, steer, and balance in the water. |
| Scale | A hard flat plate that protects an animal's body. |
| Gills | Thin, feathery body parts filled with blood. |
| Life Cycle | All of the stages in the life of a living thing. |
| Amphibian | A cold-blooded vertebrate that lives part of its life in water and part on land. |
| Lungs | Organs through which animals get oxygen from air. |
| Metamorphosis | The changes in form that occur from egg to adult. |
| Tadpoles | Fishlike animals that hatch from frog eggs. |
| Reptiles | A cold-blooded vertebrate that has lungs and dry skin. |
| Bird | A warm-blooded vertebrate that has a body covering of feathers. |
| Feather | A light body part that is found on a bird's skin. |
