Students collect evidence to investigate erosion and deposition around the schoolyard.

First graders will recognize the different types of soil and understand that through erosion from rocks is where we get soil.

Against the backdrop of the devastating 1930's Dust Bowl, this video segment adapted from Interactive NOVA profiles an organic farmer and the techniques he uses to conserve topsoil.

Wessels Living History Farm explains some of the history behind contour plowing in the United States. Great photo illustrating contour planting on terraces in Iowa included.

Everything you need to know about sedimentary rocks and the processes by which they are created, including weathering, soils, environments, and classification.

Describes the formation of rivers and the transport of soil and sediment. Links to related material is provided within the text.