character: Nutrient Cycling
topic: Importance of nutrient cycling in ecosystems
grade: 9
subject: Chemistry
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character: Ecology
topic: Role of producers in ecosystems
grade: 9
subject: Chemistry
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character: Biogeochemical Cycles
topic: Understanding the water cycle and its impact on ecosystems
grade: 9
subject: Chemistry
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character: Decomposers
topic: The role of decomposers in nutrient cycling
grade: 9
subject: Chemistry
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