The variables for this experiment include mass, volume, and the materials in the various balls, as well as their densities. in part i, you will be comparing a table tennis ball and a golf ball. use the drop-down menus to complete the sentences and identify the independent and dependent variables. in part i, the independent variable, the one that is intentionally manipulated, is . in part i, the dependent variable, the one that you measure the response in, is .