why is there wind on earth?

Answer 1

warm and cold air creates wind. Warm air rises and cooler air rushes in to take it's place.
It's important to remember that there is no such thing as nothingness on earth. Every space on this world is filled with something. If it moves, everthing else will move too.,

Answer 2

Simply put, wind is the motion of air molecules. Two concepts are central to understanding what causes wind: air and air pressure. Air comprises molecules of nitrogen (about 78 percent by volume), oxygen (about 21 percent by volume), water vapor (between 1 and 4 percent by volume near the surface of the earth) and other trace elements. Every time we breathe, the air we inhale is composed of about the same relative ratios of these molecules, and a cubic inch of air at ground level contains about 1020 molecules.

All of these air molecules are moving about very quickly, colliding readily with each other and any objects at ground level. Air pressure is defined as the amount of force that these molecules impart on a given area. In general, the more air molecules present, the greater the air pressure. Wind, in turn, is driven by what is called the pressure gradient force. Changes in air pressure over a specified horizontal distance cause air molecules from the region of relatively high air pressure to rush toward the area of low pressure. Such horizontal pressure differences of all scales generate the wind we experience.

The areas of high and low pressure displayed on a weather map in large part drive the (usually) gentle ambient wind flow we experience on a given day. The pressure differences behind this wind are only about 1 percent of the total atmospheric pressure, and these changes occur over the range of multiple states. The winds in severe storms, in contrast, are a result of much larger and more concentrated areas of horizontal pressure change. Tornadoes are great examples. In June 2003 Tim Samaras of Applied Research Associates placed a scientific probe in the direct path of an F4 (devastating) tornado near Manchester, S. Dak. He found that the air pressure dropped by 10 percent of the total atmospheric value over the radius of the tornado. The magnitude of this air pressure change, and the very short distance over which it occurred, explains why the winds are so destructive in this phenomenon: air molecules are very quickly accelerated into the very low pressure at the center of the tornado where the water vapor contained in the air often condenses, creating the often visible "condensation funnel."

Answer 3

Wind is caused by the sun heating the earth's atmosphere.

Answer 4

Warm air is lighter than cold air. This cause the movement of air and created wind.

Answer 5

I believe wind is caused by air moving from areas of high to low pressure. Other than I can't tell you anymore. I'm sorry I can't really help you very much. =(

Answer 6

Wind is built up on general releases of gases that change and vary in temperature if you need more help i suggest the library and wikipedia for a quick look.

Answer 7

Beacuse of the athmospere we should be tnxful hat we have air on earth to breath because if we dont have air on earth imagine how can we breath. we really need air to breath. Be thankful to god

Answer 8

Because somethings have to be wound. Like a clock for instance. Wind is the present tense of wound. If you could not wind something it would never be wound.

Answer 9

what do you mean god created it but if you wanna know the answer the wind comes from the ocean

Answer 10

because of the difference of air temperature on different locations, high temperature air goes up, low temperature goes down.
to make this answer short, here's a site:
http://cbs2.com/josh_blog/local_blogentry_362092452.html