character: Mr. Thompson
topic: Waves and Their Role in Communication
grade: 9
subject: Chemistry
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character: Ms. Garcia
topic: The Electromagnetic Spectrum
grade: 9
subject: Chemistry
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character: Dr. Patel
topic: Sound Waves and Their Applications
grade: 9
subject: Chemistry
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character: Mrs. Chen
topic: Light Waves and Optics
grade: 9
subject: Chemistry
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