Earth
What arc is created by refraction and light?
More Questions from Earth
How cold does it need to be outside before it can snow?
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What type of scientist studies microscopic plants and animals?
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Which volcano in Iceland was once thought to be a gateway to the underworld?
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What mineral makes both sapphires and rubies when cut and polished?
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What is a region of Earth in which all areas share the same time called?
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On October 11, 1999 the world population hit a milestone of how many?
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In weather terms, what turns to water in a "spring thaw"?
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