Can someone help its in science EXAM

The variables for this experiment include mass, volume and the materials in the various balls, as well as their densities. in part iii, you will be investigating the questionable baseball. use the drop-down menus to complete the sentences and identify the independent and dependent variables. in part iii, the independent variable, the one that is intentionally manipulated, is . in part iii, the dependent variable, the one that you measure the response in, is

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Difference between series and parallel circuits