Science Bootcamp: Stream Tables. How did flow rate affect the number of streams created? How did the soil/gravel size affect erosion? How did the rate of water flow change when soil saturation changed? The 7th graders hold a science symposium to share their findings. They investigated rates of water flow through various sized soil/gravel grains, saturation of soil/gravel, slope of soil/gravel, and initial rate of water flow. Data was carefully collected and then presented as graphs on their poster displays.