When scientists talk about how big something is, they are really talking about its volume, or the amount of space it takes up. The Measuring Volume Gizmo allows you to measure the volumes of liquids and solids using a variety of tools. To begin, remove the 50-mL graduated cylinder from the cabinet and place it below the faucet. To turn on the faucet, drag the slider next to the faucet up. Fill the cylinder about halfway, as shown. Place the magnifier over the waterline. d by each small tick mark?