Earth

What is the imaginary line that runs from the North to the South Pole called?

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Which of the following lakes has a higher salt content than normal?
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What is another name for continental glaciers?
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What weather-related term comes from Greek words for "high in the sky" and "knowledge"?
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What is the hardest mineral known on Earth called?
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What type of radar measures radial velocity?
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What did ancient farmers probably use to tell the passing of seasons?
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What is the natural process by which rocks break down into smaller chunks?
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What is the federal weather agency in Canada called?
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