character: Mark Reyes
topic: Innovations in Water Quality Sensors for Chemistry
grade: 9
subject: Chemistry
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character: Dr. Lisa Chen
topic: Advancements in Environmental Chemistry
grade: 9
subject: Chemistry
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character: Professor John Smith
topic: Chemistry of Water Filtration Systems
grade: 9
subject: Chemistry
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character: Maria Gonzales
topic: Impact of Water Pollution on Ecosystems
grade: 9
subject: Chemistry
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