Structured around the question of how different ground cover types affect runoff and soil loss, this lab sheet walks students through building a PVC pipe rain simulator, preparing a divided tray with three test sections (bare soil, grass or plant cover, and mulch or rock cover), and collecting measurable runoff data from each section. The data table tracks runoff volume in milliliters and soil loss rated low, medium, or high, making this rain simulator to study erosion experiment a strong fit for grades 4-7 homeschoolers studying earth science or environmental science.

The sheet works well as a standalone unit study session or anchors a broader soil and water conservation sequence. Students complete an if-then-because hypothesis before they begin, then return to four analysis questions that push them to compare results across all three test areas and draw conclusions about how plants reduce erosion. Finishing the full sheet demonstrates data collection, controlled variable thinking, and evidence-based reasoning.