| A | B |
| Hypothesis | An educated guess, tentative answer to a question |
| Theory | A well supported, well tested answer |
| Variable | The unknown, changing part of the experiment |
| Control | The known part of the experiment |
| Independent variable | The variable that is changed by the researcher |
| Dependent variable | The variable that changes as a result of the experiment |
| Biology | The study of life |
| Cell | The smallest living unit of all living things |
| Unicellular | One cell |
| Multicellular | Many cells |
| Sexual reproduction | Reproduction that involves two parents |
| Asexual reproduction | Reproduction that results in offspring that are identical to the parent |
| Data | Information collected in an experiment |
| Inference | A generalization made based on observations |
| Homeostasis | Maintaining constant, stable conditions |
| Autotroph | An organism that can make its own food |
| Heterotroph | An organism that has to eat to get energy |