character: Ms. Sarah Stream
topic: Chemical Composition of Water and Its Impact on Aquatic Life
grade: 12
subject: Chemistry
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character: Dr. Emily Waters
topic: The Role of pH in Freshwater Ecosystems
grade: 12
subject: Chemistry
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character: Professor John Rivers
topic: Effects of Water Temperature on Marine Species
grade: 12
subject: Chemistry
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character: Ms. Claire Ocean
topic: Nutrient Pollution and Its Consequences for Aquatic Habitats
grade: 12
subject: Chemistry
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