character: Ms. Smith
topic: Chemical Equilibrium in Ecosystems
grade: 11
subject: Chemistry
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character: Dr. Johnson
topic: Impact of Nutrient Cycling on Ecosystem Stability
grade: 11
subject: Chemistry
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character: Mr. Thompson
topic: The Role of pH in Aquatic Ecosystems
grade: 11
subject: Chemistry
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character: Ms. Lee
topic: Biogeochemical Cycles and Their Importance
grade: 11
subject: Chemistry
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