Discover what sediment is and how it can have a positive or negative impact on the surrounding environment with this hands-on project. Each student group assembles their own Sediment Settler by adding four types of particles, in varying sizes and densities, to a plastic tube with screw cap. Once assembled, students observe their Sediment Settler before and after adding water, and compare settling time with particle size. Designed by the Science Kit Product Development Team. Includes instructions for addressing two levels of National Standards. Tube size: 15 x 2.5cm. Grades 4–8.