Every physical process of weather is associated with what key factor?

The key factor associated with every physical process of weather is heat exchange. Weather phenomena, such as the formation of clouds, precipitation, and changes in temperature, are fundamentally governed by the transfer of energy. This energy transfer primarily occurs through the absorption and release of heat in the atmosphere.

Heat exchange drives convection currents, influences air pressure systems, and affects moisture content in the air. For example, the sun heats the Earth's surface, causing warmer air to rise. This rising air cools as it ascends, leading to condensation and potential cloud formation, which is a direct result of heat exchange.

Additionally, the warming or cooling of air masses can influence wind patterns and the resulting weather conditions. Hence, all weather processes are intricately linked to how heat is exchanged within the atmosphere, making it the cornerstone of understanding weather dynamics.