Wind Wind Wind is air moving across the earth's surface. Wind may blow so slowly and gently that it can hardly be felt. Or it may blow so fast and hard that it smashes buildings and pushes over large trees.
Strong winds can whip up great ocean waves that damage ships and flood land.
Wind can blow away soil from farmland so crops cannot grow. Sharp grains of dust carried by wind wear away rock and change the features of land. Wind is also a part of weather. A hot, moist day may suddenly turn cool if a wind blows from a cool area to the hot area. Clouds with rain and lightning may form where the cool air meets the hot, moist air.