character: Seismologist Sam
topic: Understanding Primary and Secondary Waves
grade: 10
subject: Geography
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character: Geology Guru
topic: Introduction to Earthquakes and Wave Propagation
grade: 10
subject: Geography
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character: Wave Watcher Wendy
topic: Studying Seismic Wave Characteristics
grade: 10
subject: Geography
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character: Earthquake Educator Ed
topic: Comparing Primary, Secondary, and Surface Waves
grade: 10
subject: Geography
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