Wind

Wind 







     Winds are common in earth’s atmosphere. They vary in scale and intensity from gentle breezes to violent storms like tornadoes, and can be daily or seasonal. Wind is the movement of air from an area of high pressure to an area of low pressure. The greater the difference between the areas of pressure, the faster the wind moves. Wind speed is measured using the Beaufort scale, which ranges from 0-12. At 12 on the scale, hurricane wind speeds can reach 480 kph (300 mph)

Tornadoes 

      They are the rotating columns of air that can be violently destructive. Most have wind speed of less than 200 kph (120mph), but they can reach 480 kph (300 mph). Tornadoes are characterized by a central spinning, funnel-shaped column of air, which extends from the clouds to the ground. They have the power to destroy crops and buildings. Tornado formation is associated with summer storms, especially in the USA.

Thunder storms 

       Thunderstorms form in large cumulonimbus clouds. They carry water vapour high into the atmosphere where it condenses it into hail and ice. Lightning-The movement of hail and ice in a thunderciound causes an electric charge to buld up,which zaps down as lightning