| A | B |
| Abdomen ** | The main body part of an animal or insect where the stomach and intestines are found. |
| Amphibian | One of a large group of animals with backbones that live part of their lives in water and part on land. |
| Backbone | The main bone, made up of many small bones joined together that runs along the middle of the back in some animals. |
| Behavior | The way a living thing acts. |
| Characteristics | a special feature or quality |
| Cold blooded | An animal that cannot make its own body heat to stay warm, their temperature is the same as their environment. |
| Exoskeleton | A hard outer covering that supports and protects some animals without backbones. |
| Gills | Organs for breathing found in fish and amphibians. |
| Instinct | A behavior that an animal is born with and does not need to learn. |
| Mammal | An animal with a backbone that usually has hair on its body and feeds milk to its young. |
| Molt | To shed an animal's outer covering. |
| Reflex | A simple, automatic behavior or reaction. |
| Reptile | An animal with a backbone that has dry, scaly skin. |
| Response | A behavior or reaction caused by a stimulus. |
| Stimulus | An event or action that causes a behavior or reaction. |
| Vary ** | To change or make different. |
| Warm blooded | An animal that makes its own body heat to stay warm. |
| exo | outside, out, without |
| endo | inner, within |
| skeleto | a dried body |
| rept (il) | creep, crawl |
| ology | the study of |
| bio | life |
| tion | the act of _____ ("doing") |
| produce | to make |
| re | again |
| mono | one |
| bi / di | two |