JoinSinking & Floating: A Graphical Representation of the Concept of Density
Density is a derived quantity that can be confusing for middle school students. Try using a graphical depiction of mass and volume to guide students in understanding and applying this concept. In this activity, students will collect various materials, test whether each of the objects will float or sink in tap water, and measure the volume and mass of each object. By graphing the data, students will make the important conceptual leap from their initial thoughts and findings to exact criteria for floating.