soils

Presents a discussion of soil pollution and erosion, which is magnified by human activity, and how it has been addressed, covering the Dust Bowl of the 1930s and resulting changes in farming methods, with commentary by experts and noteworthy case studies.

Simple text and color photographs depict the different types, locations, and composition of dirt.

Discusses the nature, uses, and importance of soil and the many forms of life that it supports.

Introduces simple scientific principles involving soil, and provides instructions for experiments that can be done at home to prove them. Includes full-color illustrations, a glossary, and further reading sources.

Contains twelve lessons designed to heighten student awareness of the value of soil through hands-on activities, and includes teaching tips, a glossary, and resources.

Explains what soil is made from and what it contains, describes the scientific method, and includes experiments testing different soil concepts.

Explains what rocks are, different types of rocks, how they shape the land, how rocks are used and more.

Text and photographs introduce the science of soil, from the different types, to where they can be found.

Explains how soil is formed, why soil is important, and what soil needs to make plants grow, presenting a demonstration of the role rock erosion plays in soil formation and visiting a grade school where lunch leftovers and earthworms are used to improve the soil in the school's garden.