This lesson emphasizes how evaporation affects precipitation which contributes to heavy rain and storms. It lays the foundation for thinking about the ways that trees can mitigate increased weather effects in urban environments like Washington, D.C. First, students discuss their past observations of evaporation and write a hypothesis to describe this phenomenon. Next, students make entries to their lab journals based on classroom instruction of the water cycle using visuals and a NASA weather video. As a class, they label a diagram that models the stages of the water cycle.
The purpose of this activity guide is to help students understand their garden as a model watershed through the collection and analysis of rainwater filtration data. This guide serves as an extension to the Nature Works Everywhere How Natural Areas Filter Water lesson plan, which can be found at www.NatureWorksEverywhere.org.