Earth
What evidence tells scientists that some dinosaurs may have lived together in groups?
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What periods of the Earth's history had glaciers covering a lot of the Earth?
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What name is used specifically to describe the region around the South Pole?
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What type of fossils give only evidence of activities of past living creatures?
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What two countries lie on opposite sides of the Juan de Fuca Strait?
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What are ridges of rock debris caused by glacial action called?
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What is the system consisting of the Earth's sun and the eight planets orbiting it called?
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