How Did Canaries Help Coal Miners?
There was a time when coal miners wouldn’t set foot in a coal mine without a canary present. Canaries protected them from a danger that lurks in the mines—carbon...
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How Will You Define Vacuum?
It is a completely empty space. In a vacuum, pressure is so low that any particles in the space do not affect any processes being carried on there. It is a condition...
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What Is the Mistral?
Mistral is the name given to a wind which blows in the Rhône Valley in France. The wind is caused by an exchange of air between the cold hinterland of France’s Central...
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Why Does Dew Fall Overnight?
Dew is the result of condensation on the surface of the earth. At night the earth sometimes becomes colder than the air, and when water vapour in the air touches leaves...
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What Makes the Wind?
Wind is the movement of air across the surface of the earth, caused by warm air rising and being replaced by cooler air. Except for the monsoons, the chief global winds...
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