The sun plays a critical role in the Earth's weather systems by providing the energy necessary for atmospheric processes. Solar radiation heats the Earth's surface, causing variations in temperature and pressure that drive the movement of air masses, resulting in wind patterns. The uneven heating of the Earth leads to the formation of high and low-pressure systems, influencing weather events such as storms, precipitation, and cloud formation. Additionally, the sun's energy is pivotal in the water cycle, facilitating evaporation, condensation, and precipitation, ultimately sustaining life on Earth and maintaining climatic balance.