Density Curriculum

Section 3—The Causes of Differences in Density

This section introduces three primary causes of differences in density: differences in atomic mass, differences in atomic and molecular bonds, and mixed density. It moves beyond the relationship that defines density to explore the micro- and macro- "material causes of density." It introduces the concept of multiple causes and how to reason in instances where an outcome has more than one potential contributing cause. Finally, it explicitly addresses the puzzle of whether density is static or dynamic, and makes related connections to the real world.