The process by which water vapor cools and changes into water droplets is called condensation. This physical process occurs when water vapor in the air loses energy and transitions from a gaseous state back to a liquid state. When warm, moist air rises and cools, it reaches a temperature known as the dew point, where saturation occurs. As a result, tiny water droplets form around particles in the air, leading to phenomena such as fog, dew, or clouds. Condensation is a crucial part of the water cycle, contributing to precipitation and the overall balance of ecosystems.