Earth's soil differs from one region of the globe to another. In Soil, students will learn about the different types of soil, their composition and how it is important for sustaining plant and animal life. Learn about the formation of soil and its components. Students will also examine some of the methods of conservation that are employed to protect Earth's soils, including the ways in which modern farmers are fighting the forces of erosion through new plowing techniques. In addition, students will investigate the relationship between the size of soil particles and their permeability in a fun, hands-on demonstration. Part of the Earth Science in Action DVD Series. A Teacher's Guide is included and available online. 23 minutes. Grades 5 to 8.