character: Geological Time Scale
topic: Geological Time Scale and its significance in understanding Earth's history
grade: 9
subject: Geography
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character: Pangaea
topic: The formation and break-up of the supercontinent Pangaea
grade: 9
subject: Geography
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character: Gondwana
topic: Evolution and significance of the Gondwana supercontinent
grade: 9
subject: Geography
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character: Laurasia
topic: The role of Laurasia in the evolutionary history of the Earth's continents
grade: 9
subject: Geography
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