Question

why must an experiment have constants? constants act as a baseline for comparison when changing the independent variable. constants act as a baseline for comparison when changing the dependent variable. constants ensure that only the independent variable is affecting the results of the experiment. constants ensure that only the dependent variable is affecting the results of the experiment.

Explanation:

Constants in an experiment are factors that are kept the same throughout. They ensure that any changes in the outcome are due only to the independent variable being manipulated, not other extraneous factors.

Answer:

Constants ensure that only the independent variable is affecting the results of the experiment.