Often thought of as “just dirt,” soil is actually a complex mixture of inorganic minerals, organic matter, air and water. The size of the particles in soil affects not only how much air is present but also the ability of soil to hold water. In this kit, students determine the permeability and porosity of soil by measuring how easily air and water move through soil, and the volume of air and water the soil will hold respectively. The moisture content, permeability rate and porosity of local soil samples may be tested and compared to that of sand. Includes detailed instructions, background information and teacher notes.
Soil samples may need to be collected locally.
Materials Included in Refill Kit for 30 Students in Pairs: Sand, 1 kg, 2 Cheesecloth, 4 sq yd Cups, plastic, 10 oz, Pkg/15 Dishes, aluminum, disposable, 50 mL, 15 Magnifiers, plastic, dual lens, 15 Plastic tubes, clear, one end closed, 1½" diameter x 6", 15 Plastic tubes, long, both ends open, 1½" diameter x 6", 15 Rubber bands, Pkg/120 Teaspoons, plastic, 15