character: Earth Explorer
topic: How Seismic Waves Travel Through the Earth
grade: 10
subject: Geography
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character: Seismologist Sam
topic: Understanding the Structure of the Earth
grade: 10
subject: Geography
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character: Geography Guru
topic: The Basics of Seismic Waves
grade: 10
subject: Geography
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character: Professor Plate Tectonics
topic: How Earthquakes Affect the Earth's Crust
grade: 10
subject: Geography
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