This lesson focuses on distinguishing between water vapor and chemical aerosols, specifically in the context of understanding the visual differences and implications of these substances. Through visual comparisons of steam and a chemical mist, students will analyze characteristics such as color and thickness. Activities encourage critical thinking about common misconceptions, particularly the belief that vaping products only contain harmless water vapor. The lesson includes discussions about toxic chemicals found in e-cigarettes, fostering a deeper understanding of health risks associated with aerosol products.