Worms as well as many small bugs, bacteria and molds eat dead plant parts. The castings are very rich in the nutrients needed for plant growth. Worm compost, made up of worm castings, is one of the richest compost forms. Worm compost is an excellent example of how the Decomposition Nutrient Cycle recycles dead plant and animal parts into new plants. Students explore for worms in rich, moist garden soil, under leaves, rocks, logs, or any rotting plant materials.
Students look for evidence of worm castings - lumpy soil pellets next to worm tunnels.
Once students find worms, they closely observe their anatomy, size, texture, and body parts. For this classroom lesson, students gather worms, transfer them to containers, add moist soil and leaves, and temporarily bring them inside.