| Term | Definition |
| Accurate | Data that's close to true value |
| Precise | Data Values that are close to each other |
| Consistent | Doing procedures exactly the same |
| Reproducibility/Repeatable | Procedures so clear that it can be repeated the same way; use of multiple trials to acheive averaged results for validity |
| Reliability | the extent to which a test yields consistent results |
| Validity | the extent to which a test measures or predicts what it is supposed to; constant variables remain the same throughout the expiriment |
| Credibility | the quality of being believable or trustworthy; based on high validity |
| Independent Variable | The experimental factor that is manipulated; the variable whose effect is being studied. |
| Dependent Variable | A variable that is measured or observed for change in response to the Independent Variable |
| Constants (control variable) | conditions that stay the same in the experiment |
| Control Group | in an experiment, a group that serves as a standard of comparison with another group to which the control group is identical except for one factor: the independent variable |
| Scientific Fact | the observation of nature |
| Scientific Law | general "rules" of natural events based on repeated observations; it's often written as equations |
| Scientific Theory | an explanation of naturally occuring events based on many credible study's/expiriments; explains why events occur |