This is an activity which requires charting the density of metals. Some of the metals are used in coinage. It helps the students to distinguish between metals that are heaver, and more dense. It has a few critical thinking questions on coinage, and density. Have fun! The formula for density, is important for many facets of life! Think about what things float, and how it can affect shipbuilding,pools, etc.Thanks ever so much for visiting the House of the Three Dinosaurs!