character: Dr. Atom
topic: Introduction to Chemical Reactions
grade: 9
subject: Science
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character: Mrs. Molecule
topic: Balancing Chemical Equations
grade: 9
subject: Science
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character: Professor Catalyst
topic: The Role of Catalysts in Reactions
grade: 9
subject: Science
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character: Agent Energy
topic: Energy Changes in Chemical Reactions
grade: 9
subject: Science
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