Topsoil contains the decayed remains of plants and animals. This makes the soil good for growing plants. Subsoil is below the topsoil. Have students say this name together. Look at materials found in each soil.
Bedrock is the layer of soil under the subsoil.
It contains large pieces of rock. The children can make a soil profile. Get a tin can with both ends removed. The can will be used as a soil probe. Push the can into the soil.