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Earth's Layers/Plate Tectonics by imalloryb
worldbookonline
World Book for Kids Earth's Layers
worldbookonline
World Book for Students Earth (see sidebar for topics)
harcourtschool
Earth's Layers
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neok12
Earth's Structure Quiz
thinkquest
Breakup of Pangea
co
Pangea Interactive
watchknow
Plate Tectonics Video (1:21)
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