| A | B |
| Variable | Anything that changes |
| Independent Variable | Manipulated variable / What you purposely change |
| Dependent Variable | What you measure / trying to find out |
| Controlled Variable | Variables that must remain constant |
| Hypothesis | Prediction - what will happen & why |
| Problem | Question that starts an investigation |
| Control Group | Test group not affected by the IDV |
| Extraneous Variable | Outside variable that could affect outcome / data |