In this activity we will consider the effects of changing the surface area and volume as a result of changing the agar cube size. To consider both of those components, we will make them one variable by calculating the surface-area-to-volume ratio. To calculate the surface-area-to-volume ratio, you will divide the surface area by the volume of your cube. This measurement tells us how much surface area there is for every unit of volume. Substances entering the cell (like vinegar entering the cube) can only enter through the surface, of course, so how much vinegar gets in depends on the amount of surface area available for that diffusion. Calculate the surface-area-to-volume ratio for cube #1 (cube Trial #1)