Question

question 7 of 10
juan propped up a graham cracker in a shallow bowl. he then set up an electric fan to blow on the graham cracker at three different speeds. what is juans independent variable in this experiment?
a. the starting weight of the graham cracker
b. the angle of the graham cracker
c. the amount of cracker crumbs produced
d. the speed of the electric fan

Explanation:

In an experiment, the independent variable is the factor that the experimenter changes or manipulates. Here, Juan changes the speed of the electric fan.

Answer:

D. The speed of the electric fan