In earlier investigations in this soil unit, students mostly focused on the inorganic parts of the soil profile. In this investigation, students will observe some of the living things in soil.
For each group of four students:
You can help your students investigate some of the chemicals in soil that affect plant growth.
You can help your students investigate the different ways in which water moves through soil particles.
You can help your students investigate methods of separating soil.
Photo by Lynn Betts, courtesy of USDA NRCS