character: Dr. Smith
topic: The Role of pH in Environmental Science
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Acid-Base Reactions in Water Quality
grade: 9
subject: Chemistry
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character: Mr. Lee
topic: Effects of pH on Aquatic Life
grade: 9
subject: Chemistry
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character: Dr. Martinez
topic: Soil pH and Plant Growth
grade: 9
subject: Chemistry
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