The Whole is Equal to the Sum of It's Parts

This is a lab where students practice with the idea that the sum of the parts is equal to the weight of the whole. Students create "no-bake" cinnamon rolls using very basic ingredients (butter, white bread, and cinnamon sugar). As they make their cinnamon rolls they weigh each ingredient on a balanced scale. When they weigh their finished product it should weigh the same as the sum of its parts.