Earth

Which age is known as the "Age of Fish"?

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What basic cloud formation resembles cauliflower?
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What is the measure of the moisture level of air called?
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What is the name of the submerged fringe of a continent?
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What mineral makes both sapphires and rubies when cut and polished?
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How much salt is in every gallon of seawater?
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On which continent is the biggest area of rain forest found?
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Where is the foggiest place in the world?
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What instrument indicates wind direction?
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