Earth

What is the imaginary line that runs around the Earth halfway between the poles called?

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What is the solid form of water?
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What cloud has a flat, sheetlike appearance?
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What is the only continent on Earth that does not have snakes?
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What branch of science deals with fossils of living things?
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What is the study of atmospheric conditions and climate called?
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Mary Anning was the first to discover complete fossils of which prehistoric marine reptile?
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What type of clouds are thick and puffy and can sometimes turn into thunderstorms?
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