character: Inge Lehmann
topic: Earth's Inner Core and Seismology
grade: 12
subject: Geography
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character: Seismologist
topic: Earth's Structure and Seismic Waves
grade: 12
subject: Geography
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character: Geologist
topic: Theoretical Models of Earth's Interior
grade: 12
subject: Geography
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character: Geophysicist
topic: Influence of Earth's Core on Geomagnetic Field
grade: 12
subject: Geography
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