The process when a liquid becomes solid is called freezing. During freezing, a liquid's temperature decreases to below its freezing point, causing its particles to lose energy and arrange themselves into a more structured, stable form as a solid. This transition occurs in various substances, such as water turning into ice. Freezing plays a vital role in many natural processes, including the formation of ice caps, ensuring the survival of certain ecosystems, and is crucial for various industrial and culinary applications.