A student sets up an experiment to investigate the effect of temperature on the volume of 50 grams of gas inside a balloon. Which statement correctly describes the design of the experiment?
• The temperature is an experimental control, and the volume is the independent variable.
• The volume is an experimental control, and the temperature is the dependent variable.
• The mass of the gas is an experimental control, and the temperature is the independent variable.
• The temperature is an experimental control, and the mass of the gas is the dependent variable.