Explain what happens when air is heated or cooled. Explain how the temperature of air affects the air pressure. Explain how air and changes in air pressure cause wind. Explain why the direction in which the wind blows at the seashore changes. Winds blow horizontally and vertically from all compass directions.
Vertical winds are generally more gentle than horizontal winds.
Vertical movements of air are very important. When air rises, its pressure is reduced, causing it to expand. As a result, the air cools. As air cools, its ability to hold moisture decreases. When cooling air becomes saturated with moisture, clouds are formed.