character: Dr. pH Balance
topic: Measuring Acidity and Alkalinity
grade: 6
subject: Science
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character: Professor Acid
topic: Introduction to pH Levels
grade: 6
subject: Science
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character: Captain Alkaline
topic: Understanding Basic Solutions
grade: 6
subject: Science
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character: Scientist Sally
topic: The Importance of pH in Nature
grade: 6
subject: Science
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