A student conducts an experiment to determine how the amount of water given to a plant affects its growth. Which of the following is not a constant or control for this experiment?

The experiment tests how the amount of water affects plant growth, so the amount of water is the variable that changes. The other factors, such as plant type, soil amount, and time in the sun, should be kept constant. Therefore, “the amount of water” is not a constant or control.

AI-written and checked against the verified answer.