Question

the passage below describes an experiment. pedro was baking cupcakes for his stepfathers birthday. he wondered whether the volume of a cupcake would be affected by the type of flour in the batter. pedro bought three types of flour and made three batches of cupcakes—one using whole wheat flour, one using cake flour, and one using buckwheat flour—following the same recipe for each. after all the batches had baked and cooled, pedro measured the dimensions of one cupcake from each batch to calculate its volume. complete the sentence. in this experiment, the type of flour used was an independent variable a dependent variable

Explanation:

The independent variable is what the experimenter changes. Here, Pedro changes the type of flour to see its effect on cupcake volume. So the type of flour is the independent variable.

Answer:

an independent variable