character: Mr. Lee
topic: Energy Changes in Reactions
grade: 9
subject: Science
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character: Ms. Brown
topic: Chemical Reactions and Energy
grade: 9
subject: Science
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character: Mr. Smith
topic: Exothermic and Endothermic Reactions
grade: 9
subject: Science
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character: Dr. Kim
topic: Thermodynamics in Chemical Reactions
grade: 9
subject: Science
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