| A | B |
| Observation | What you feel and notice with your senses |
| Inference | The explanation of an observation |
| Hypothesis | An educated guess |
| Theory | A hypothesis supported by testing |
| Law | A theory believed to be true by most scientists |
| Independent Variable | The object the scientist changes in an experiment |
| Dependent Variable | Responds to the Independent Variable |
| Constants | Parts of the experiment which do not change |
| Experimental Groups | Groups which contain the independent variable |
| Control Group | Groups which do not contain the independent variable |