character: Ms. Sarah Thompson
topic: Microorganisms as Water Quality Indicators
grade: 12
subject: Chemistry
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character: Dr. Emily Carter
topic: Chemical Analysis of Water Quality
grade: 12
subject: Chemistry
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character: Mr. John Davis
topic: The Role of pH and Microorganisms in Aquatic Ecosystems
grade: 12
subject: Chemistry
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character: Ms. Lisa Robinson
topic: Impact of Pollution on Water Quality and Microbial Life
grade: 12
subject: Chemistry
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