Question

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the control variables are...

Answer 1

it is the amount of soil, sunlight, and the music they listen to

control variables are the elements that are always constant and not changed throughout the experiment.