What is Wind?

                                                       What is wind? 

Wind is the movement of air flows. Some are hot whilst others are cold. A study by the university of British Columbia found that a single urban tree can help moderate wind speeds and the cost of heating lowers.

Wind pressures are created by the high temperature and low temperature in the air. A hot air balloon rises when you pump hot air into the balloon part and lowers when you stop. This is because the hot air rises and cold air falls. 

Wind is made by the uneven heating of the earth. It is created by the uneven heating of the earth's surface by the sun. Since the earth's surface is made of various land and water formations, it absorbs the sun's radiation unevenly. Two factors are necessary to create wind: speed and direction.

There are 5 different types of wind zones. Polar easterlies,westerlies,horse latitudes, trade winds and doldrums. Polar easterlies are dry, cold and sharp wind streams that come from the north/south pole. Westerlies are winds blown from the west at mid altitude. They are fed by the polar easterlies. They also feed horse latitudes which squish them from both sides. Horse latitude is a narrow zone of hot, dry wind. They are found between westerlies and trade winds. Trade winds are strong prevailing winds that blow from the east across the tropics. This type of wind is very predictable. Doldrums are very weak streams of wind and the weather is usually calm, like a breeze on a hot summer's day. 

Wind results: wind is a moving stream of air. There are five different types of wind. It is made by uneven heating of the earth. It is 78% nitrogen( because 78% of air is nitrogen), 21% oxygen and 1-4% water vapour. There is still so much for me to learn about wind.