Middle schoolers examine how erosion is affected by the composition of the soil and the slope of the land. They look at plant roots, rocks and land slope as experimental factors. They complete the associated worksheets before discussing...

Fourth graders investigate the causes of erosion. Through several demonstrations including one using sugar cubes and warm water, they observe the effects of erosion. In groups, 4th graders conduct similar experiments and record their...

Students discuss pollution and the steps in the hydrologic cycle. They follow a drop of water through a watershed simulation. They discover the components of a water cleaning system as well.