| A | B |
|---|
| variables | The factors in an experiment that can change. |
| manipulated variable | The variable that is deliberately changed in an experiment. Also called dependent variable. |
| responding variable | The variable that changes in response to the manipulated variable. Also called independent variable. |
| controlled experiment | An experiment in which only one variable is changed at a time. |
| controlled variable | Factor in an experiment that is intentionally kept the same. |
| type of meat | A controlled variable in Redi's experiment on spontaneous generation. |
| gauze covering | A manipulated variable in Redi's experiment on spontaneous generation. |
| presence of maggots | A responding variable in Redi's experiment on spontaneous generation. |
| time boiled | A controlled variable in Spallanzani's experiment on spontaneous generation. |
| sealed vs. unsealed flask | A manipulated variable in Spallanzani's experiment on spontaneous generation. |
| presence of microorganisms in gravy | A responding variable in Spallanzani's experiment on spontaneous generation. |
| experimental error | The difference between the actual value of a variable and the measured value of a variable. |
