Earth

Which is heavier, cold air or warm air?

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Which of these is a spiral storm that can be many miles wide?
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What is the opposite of El Nino?
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What does your body use to get rid of salt?
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Sudden flooding caused by heavy rain is called what?
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Weather radar that measures direction and speed of a moving object best fits which science term?
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What clouds have bases between 6,000 and 18,000 feet?
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What is it called when a plant produces two kinds of sex cells?
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Abnormally warm weather in autumn is called what?
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