| A | B |
| variable | a factor that affects the experiment |
| independent variable | the factor that is deliberately changed so as to observe the consequences of the changes |
| dependent variable | the factors that are changed as a result of the independent variable |
| constant variable | the factors that are kept constant so as to make the experiment fair |
| calibration | the determination of the true value of the spaces of any graduated instrument |
| hypothesis | an educated guess |
| procedure | the steps taken to carry out an experiment |
| inference | to draw conclusions from the data collected |
| conclusion | using the trends of the data and one's observations to find the answer to the original experiment |
| experimental error | consistent or not reproducable trend in a series of experimental runs |
| random error | non-reproducable data that doesn't make any sense |
| systematic error | when different designs produce different results |
| linked variables | variables that affect each other |
| observation | what you see, smell, feel, taste and hear |
| repeatability | enables anyone to redo the experiment and check the validity of the result |