character: Dr. Lee
topic: Water Quality Testing: pH Levels in Different Ecosystems
grade: 9
subject: Chemistry
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character: Ms. Taylor
topic: Impact of pH on Aquatic Life
grade: 9
subject: Chemistry
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character: Mr. Johnson
topic: Acidic vs. Basic Ecosystems: A Comparison
grade: 9
subject: Chemistry
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character: Dr. Patel
topic: Measuring Water Quality: Techniques and Importance
grade: 9
subject: Chemistry
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