In "Sidewalk Chalk: Thunderstorm Cloud Diagram" your Earth Science students will work outside, in a hands-on Severe Weather project, with chalk (or inside on butcher / bulletin board paper) to study the Formation of Thunderstorms, Positive and Negative Charges, Updrafts and Downdrafts, and Lightning in Storm Clouds for your Weather / Earth and Environmental Science lesson. The lesson guides students on each part, in 4 major steps, so that they practice converting written instruction into a f