Kate gathered three boxes of the same size made of different materials: glass, clear plastic, and aluminum painted black. She pl
aced them on a window sill in the sun for an hour and then measured the warmth of the air in each box. In this experiment, the types of box materials are a(n) _____. (a) dependent variable
Answer: C. Independent variable, An independent variable is defines as the variable that is changed or controlled in a scientific experiment. ... Independent variables are the variables that the experimenter changes to test their dependent variable. A change in the independent variable directly causes a change in the dependent variable.
