What Is Wind?

    Published: 06-16-2009
    Views: 10,358
    Science expert Emerald Robinson explains what wind is and how it forms.

    Emerald Robinson: Hi! I am Emerald Robinson. And in this what is video we're going to examine the force that we call Wind.

    Wind is defined as gas in motion. Although wind is usually moving air on earth, wind in outer space can be highly charged gases called the plasma, moving away from a star, or hydrogen escaping from the atmosphere of a planet.

    Are know at we classified Winds by two main characteristics, their Strength that is how fast and with how much force they blow, and their Direction which we name by finding the direction from which the wind originates.

    For example; North winds blow from North to South, and Anemometers determine wind speed, which is measured in a unit=1.

    15 milesperhour called a Knot. So, stand winds are graded on the Beaufort Number Scale Breezes of lesson 27 Knots fall between 1 and 6. While Hurricane gales over 64 knots to qualify as a 12, 13-17 on extendedness scale rank Extreme Storms of 65 knots to over a 120 knots.

    Wind is produce when the Earth surface is not heated eventually by the sun and over warm earth rises and causes and updraft. When this happens cooler air rushes in to fill of the space they are behind, the stronger the updraft, the stronger the wind. Since air over land heats up and cools down more rapidly than air over water, there is almost always winds nears lakes and oceans.

    Winds large impacts on the earth, winds carry atmospheric moisture from place to place causing rain. The strong Winds Hurricanes and Tornadoes cause tremendous amounts of damage, and winds of road land forms, as well as sculpt the faces of mountains. Humans have learned to harness wind power from many uses.

    Winds drive large tribunes that make electricity and Winds fill the cells of ships, we even use wind for recreation as it enables us to fly kites, parasail and hand glide.