26 of the Best 5th Grade Science Projects and Experiments In this project, you'll examine the behavior of water and gravel in creek beds and the formation of sedimentary rocks. Geothermal Power Plant Model | Energyquest.ca.gov - Grades 3-6, Use a pinwheel and a can of boiling water to simulate geothermal power production. Determine how to generate the most energy from your "power plant."