The process of converting a liquid to a gas is called evaporation when it occurs under normal conditions, and boiling when it happens at a specific temperature. Evaporation occurs at any temperature and can happen on the surface of the liquid, while boiling involves the formation of vapor bubbles throughout the liquid at its boiling point. Factors such as temperature, pressure, and surface area influence the rate of evaporation. This process is vital in nature, as it contributes to the water cycle, allowing water to return to the atmosphere and forming clouds, which eventually leads to precipitation.