character: Biologist
topic: Natural Indicators from Plant Extracts
grade: 9
subject: Chemistry
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character: Chemistry Teacher
topic: Acid-Base Indicators in Everyday Life
grade: 9
subject: Chemistry
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character: Plant Scientist
topic: Use of Chlorophyll as a pH Indicator
grade: 9
subject: Chemistry
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character: Environmental Chemist
topic: Analyzing the Chemical Properties of Common Plant Extracts
grade: 9
subject: Chemistry
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