| A | B |
| Life Science | A broad field of science that studies living organisms. |
| Botany | Study of plants. |
| Zoology | Study of animals. |
| Microbiology | Study of viruses and very small living things. |
| Ecology | Study of the way living things interact with their environment. |
| Organism | Any living thing. |
| Characteristic | Quality or property that defines or classifies something. |
| Cell | Basic unit of structure and function in living things. |
| Response | Reaction to change. |
| Autotroph | Organism that can make its own food. |
| Heterotroph | Organism that cannot make its own food. |
| Homeostasis | Process of keeping conditions inside a body constant, no matter the conditions outside the body. |
| Nutrient | Chemical substance that is needed to carry out life processes |
| Ingestion | Process of taking in food. |
| Digestion | Process of breaking down food so that it can used by living things. |
| Cellular Respiration | Process by which a cell releases energy from food molecules. |
| Byproduct | Something produced in addition to the main product. |
| Excretion | Process of getting rid of waste. |
| Transport | Process of moving nutrients and wastes in a living thing. |
| Stimulus | Change that causes a response. |
| Behavior | Way in which living things respond to stimuli. |
| Migration | Seasonal movement of animals from one place to another and back. |
| Hibernation | Inactive state of some animals during winter months. |
| Spontaneous Generation | Idea that living things come from nonliving things. |
| Reproduction | Process by which living things produce new organisms like themselves. |
| Offspring | New organism produced by a living thing. |
| Asexual Reproduction | Reproduction needing only one parent. |
| Sexual Reproduction | Reproduction needing two parents. |