Unit 1: THE DIRTY TRUTH
Properties of soil: Which of 3 soils is best for a variety of soil purposes (plant growth, water absorption, decomposition, home for organisms, and building material)?
Unit 2: GONNA GET DIRTY
Human Impact on Soil: Can good soil be turned bad? What are the effect of the WHDS on soil?
Unit 3: FIGHTIN' DIRTY
Protecting Soil: How can we appreciate and protect soil? What factors affect decomposition?