character: Dr. Emily White
topic: pH Monitoring in Aquatic Ecosystems
grade: 9
subject: Chemistry
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character: Dr. John Carter
topic: Effects of pH on Freshwater Biology
grade: 9
subject: Chemistry
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character: Ms. Sarah Liu
topic: Acid Rain and Its Impact on Aquatic Life
grade: 9
subject: Chemistry
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character: Mr. David Smith
topic: Measuring Water Quality: pH and Beyond
grade: 9
subject: Chemistry
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