Question

Ann propped up a graham cracker in a shallow bowl. She then set up an electric fan to blow on the graham cracker at three different speeds. What is Ann’s dependent variable?
A. the angle of the graham cracker
B. the starting weight of the graham cracker
C. the weight of the cracker crumbs produced
D. the speed of the electric fan

Answer 1

C.

This is because that is what is being measured.

Hope this helps

Answer 2

Answer: C. the weight of the cracker crumbs produced

Explanation:

An independent variable is the one which can be changed and manipulated in an  experimental set up. The effect of such changes and manipulation can be observed on the dependent variable. The dependent variable is the one which cannot be changed and manipulated by an experimenter. The changes that occur in the dependent variable is the outcome of the experiment.

The speed of the fan is the example of the independent variable. The effect of which can be observed on the weight of the cracker crumbs produced due to the effect of the blow. Therefore, the weight of the cracker crumbs produced is the dependent variable of the experiment.