character: Ms. Johnson
topic: Chemical Reactions and Environmental Impact
grade: 9
subject: Chemistry
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character: Mr. Thompson
topic: Acid-Base Reactions in Ecosystems
grade: 9
subject: Chemistry
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character: Dr. Miller
topic: The Greenhouse Effect and Chemical Reactions
grade: 9
subject: Chemistry
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character: Ms. Lee
topic: Chemical Pollution and Its Impact on Water Sources
grade: 9
subject: Chemistry
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