The process of a solid turning into a liquid is called melting. Melting occurs when heat is applied to a solid, increasing the energy of its molecules. As the temperature rises, the molecules vibrate more vigorously, weakening the bonds holding them together. Once the temperature reaches the solid's melting point, the structure breaks down, allowing the solid to transition into a liquid state. This process is not only crucial in everyday life—such as when ice turns to water—but also in various industrial applications, including the production of metals and glass, where controlled melting is essential for shaping materials.