A scientist designed an experiment to test the effect of temperature on bacterial growth. He grew three different cultures of the bacterium E. coli under three heat lamps at different temperatures. What was the independent variable in this experiment?

Question

A scientist designed an experiment to test the effect of temperature on bacterial growth.  He grew three different cultures of the bacterium E. coli under three heat lamps at different temperatures.  What was the independent variable in this experiment?

Huy · Accepted Answer

I guess A

Steve · Answer

other things being equal, I'd say the temperature.