The document discusses sea breezes and land breezes caused by uneven heating of land and water surfaces. During the day, the land heats up more quickly than the ocean, causing warm air over the land to rise and cooler air over the water to move inland, creating a sea breeze. At night, the pattern reverses as the land cools more quickly, resulting in a land breeze with warm air moving from the ocean to the land. Diagrams show this cycle of convection currents and the directional shift of winds between day and night.