Question

William is testing what type of light best helps bean plants grow. He plants four beans in four separate pots. He places each pot in a different room and subjects them to different types of light., and he waters each plant the same amount. He uses sunlight, ultraviolet, fluorescent, and black light. William then measures the height and growth rate of each plant. What is the control for William’s experiment? A) sunlight B) ultraviolet C) fluorescent D) black light

Answer 1

The answer is A) sunlight

Answer 2

It is A, sunlight. The variable is the type of light used, and the control is used to measure the effects of the variables, so since sunlight is the normal light, it is the control.