¼ cup clean, dry play sand (Both the sand and soil in this experiment must be completely dry. This can be done by drying it in an oven)
¼ cup dry, finely ground, soil (may need to filter it to remove small pebbles) Do NOT use potting soil.
4 clean, clear collection cups that can fit the funnels
2 ½ cups of water
2 ½ cups grape Kool aid drink mix (regular strength mixed without sugar)
Worksheet – attached
Water Filtering and Soil
Science , Soils
This hands-on experiment demonstrates soil’s function as a water filter, as well as other physics concepts like hydrophobicity, soil absorption and adsorption, soil as a storage container for water, and the positive and negative charges of soil and contaminants.