The wind blows due to the fact that of differences in air push from one ar to another. Wind blows from areas of high press toward areas of short pressure. If the high pressure area is an extremely close come the low press area, or if the pressure difference is an extremely great, the wind can blow an extremely fast.What is wait Pressure?Imagine a team of acrobats in ~ the circus. One climbs up and stands on another"s shoulders. The load of the acrobat on optimal puts much more pressure on the one below. Then another acrobat climbs up and stands top top the second acrobat"s shoulders. Currently there"s even much more pressure top top the acrobat ~ above the bottom due to the fact that he is under the weight of the 2 acrobats over him. It"s the same with air. Yes, air has weight, and also probably an ext than friend think. In fact, the load of the wait on your desk at school weighs about 11,000 pounds. That"s around the exact same weight together a institution bus! since air press pushes in every directions, the air press pushing increase from under your desk balances the end the air pushing under on it, so the workdesk doesn"t please under the weight. Just like an acrobat with two world stacked on his shoulders would desire to move to wherein there wasn"t so much pressure ~ above him, air moves from locations where the push is greater to whereby it is lower.What causes Air Pressure?Air pressure depends ~ above the thickness of the air, or just how close with each other its molecule are. You recognize that a tough rubber sphere is an ext dense 보다 a Styrofoam ball and that ice cream is much more dense than whipped cream. Air reduced in the atmosphere is an ext dense than air above, for this reason air push down short is higher than wait pressure higher up. (Remember those acrobats; there"s a lot much more pressure top top the one on bottom than on the one ~ above top.) Temperature also makes alters in wait pressure. In cold air, the molecule are much more closely packed together than in heat air, for this reason cold waiting is more dense than heat air.Rising and Sinking AirSince warmth air is less dense and also creates less air pressure, it will rise; cold waiting is denser and also creates greater air pressure, and also so it will sink. When warm air rises, cooler air will frequently move in to replace it, so wind frequently moves from areas where it"s cooler to locations where it"s warmer. The greater the difference between the high and also low pressure or the shorter the distance in between the high and low press areas, the quicker the wind will certainly blow.Wind additionally blows faster if there"s naught in that is way, for this reason winds are usually stronger over oceans or flat ground. Meteorologists deserve to forecast the speed and also direction of wind by measure air pressure with a barometer.Wind DirectionAlthough wind blows from areas of high press to locations of low pressure, the doesn"t punch in a directly line. That"s due to the fact that the planet is rotating. In the northern hemisphere, the rotate of the earth reasons winds to curve come the ideal (to the left in the southerly hemisphere). This is called the coriolis effect.So in the northern hemisphere,winds blow clockwise approximately an area that high pressure and also counter-clockwise around low pressure.Go to following Page
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That"s the means Winds Blow!‣ Download the song from Amazon.com‣ lyrics to Song‣Get the most out this pages v the Weather Dude Music CDAir press helps forecasters!Not only do differences in wait pressure assist determine wind speed and direction, they aid forecast precipitation and also clear weather.
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High pressure indicates sinking air whereby clouds can not form. Short pressure indicates rising air, which permits clouds to form, bringing rain or snow.Air flows From High pressure to short Pressure