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  PowerPoint: Presentation with Audio: Soil 3: Germs in Dirt (upper elem/middle/high)
PowerPoint: Presentation with Audio: Soil 3: Germs in Dirt (upper elem/middle/high) - preview 1
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PowerPoint with Audio: Dirt is composed of many elements some of the most important are living creatures commonly called germs. Part 3 of 4 soil presentations in the Living on Planet Earth Series. This program describes the composition and function of living things in soil. It also encourages that we properly dispose of hazardous materials, recycle and compost so that soil can produce nurturing food, dependable clothing fiber and building materials.
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