The independent variable is the only factor that a scientist

varies for different groups in an experiment.

measures in an experiment.

keeps constant for each group in an experiment.

does not change throughout an experiment.

Answer: Does not change throughout an experiment.

This is because dependent variables are changed and altered to create independent variables.

For example, the rate of photosynthesis is an independent variable, but light intensity in the laboratory, temperature in the laboratory can be changed and therefore are dependent variables.