Water, water, everywhere, but pollution is a major problem. Scholars design a filtration device or process that removes dirt and other particles from water. They use various household objects such as marbles, cotton balls, or coffee...

Second graders experiment with different types of soil to find the texture. In this types of soil experiment, shake a jar of soil and water and record the settling of the soil. Students record again after 3-4 hours and note the level...