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Project title What environmental factors favor decomposition by soil microbes
Difficulty Level Middle school
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Students will be able to: describe the role of decomposer organisms in nutrient recycling and their importance in maintaining the flow of energy through an ecosystem, relate the presence of soil-dwelling organisms to soil quality, and describe physical conditions that are favorable to these organisms. This activity addresses Competency Goal 1 of the NC Standard Course of Study for sixth-grade science, "The learner will build an understanding of the lithosphere." It specifically addresses Objective 1.01, "Determine how physical and biological agents and processes form soil and affect soil characteristics." 
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