This file features a 24-page powerpoint presentation featured around the topic of soil. Topics included are:- Components of soil - minerals, humus, air, water- Soil Layers and composition - topsoil, subsoil, bedrock- How Soil is Formed - weathering and erosion- Types of soil - silt, sand, clay, loam- Soil Conservation & Importance of Soil - plant with cover, composting, types of farming, preventing pollutionMany pictures and examples are included on each slide. Real-life images and graphics