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Wind is: 1. air in natural motion, as that movng horizontally at any velocity along the earth's surface, caused by temperature differentials in air. 2. a gale, storm; hurricane. 3. any steam of air, as that produced by a bellows or fan.
I looked up the meaning from: Random House Webster's College Dictionary.
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Wind is actually an indirect type of solar energy. Wind is due to the fact that different surfaces on Earth absorb solar energy at different rates. For example, soil, water, air all absorb varying amounts of solar energy. The hot air above the Earth's surface rises and this reduces air pressure near the surface. It is replaced by colder, more dense air that sinks below it. This creates a movement of air which is known as wind. Winds move from high to low pressure. This movement of air has kinetic energy and this energy, when captured and harnessed can be transformed into electrical energy or mechanical energy. This has been done for years with windmills.
1.a. Moving air, especially a natural and perceptible movement of air parallel to or along the ground. b. A movement of air generated artificially, as by bellows or a fan or moving air: air moving across the surface of the planet or through the atmosphere at a speed fast enough to be notice www.thefreedictionary.com/wind
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