How does the weather change? Urgently begging

Weather changes are caused by atmospheric movements. Under sunlight, water evaporates and the atmospheric humidity increases. To a certain extent, when the air humidity is high enough, clouds, fog, etc. are formed. In addition, due to the sun's irradiation, The closer it is to the ground, the higher the temperature, so up and down convection will occur in the atmosphere - hot air rises and cold air settles. Clouds in the sky are also moving. When its temperature suddenly drops, the water vapor liquefies into water droplets, so It started to rain.

Other weather phenomena are more complicated, but they are all caused by the sun's irradiation and the earth's rotation.