character: Dr. Andrew
topic: Types of Seismic Waves
grade: 9
subject: Science
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character: Mr. Thompson
topic: How Seismic Waves Travel Through Earth
grade: 9
subject: Science
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character: Ms. Rodriguez
topic: The Difference Between P-Waves and S-Waves
grade: 9
subject: Science
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character: Professor Kim
topic: Seismic Wave Propagation and Earthquake Detection
grade: 9
subject: Science
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