45. NCERT Exemplar XXVII

A cool breeze flows regularly from the sea towards the land during the daytime in coastal areas. However, there is a reverse flow of air from land to sea at night. It is so because the air above land gets heated faster and starts rising during the day, creating a region of low pressurehigh volumelow volumehigh pressure below. The air above sea is comparatively cool. As a result, the air over the sea moves into this high volumelow volumehigh pressurelow pressure region. Thus, during the day, the direction of the wind is from the sea to the land. At night, both the land and the sea start to freezemeltheatcool. Since water cools down slower than the land, the air above the water is warmer than the air above land. Thus, during the night, the direction of the wind is from land to the sea.