character: Tom Jenkins
topic: Methods of Water Testing for Contaminants
grade: 9
subject: Science
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character: Dr. Alice Wong
topic: Water Quality Testing Techniques
grade: 9
subject: Science
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character: Professor Mark Stevens
topic: Identifying Contaminants in Water Sources
grade: 9
subject: Science
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character: Sara Patel
topic: Impact of Water Contamination on Health
grade: 9
subject: Science
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