character: Prof. John Smith
topic: Importance of pH and Dissolved Oxygen in Aquatic Ecosystems
grade: 12
subject: Chemistry
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character: Dr. Emily Johnson
topic: The Role of Alkalinity in Water Quality
grade: 12
subject: Chemistry
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character: Mr. Alex Rodriguez
topic: Effects of Temperature on Aquatic Life
grade: 12
subject: Chemistry
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character: Ms. Sarah Lee
topic: Nutrient Cycling in Freshwater Ecosystems
grade: 12
subject: Chemistry
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