The process when ice turns into water is called melting. Melting occurs when the temperature of ice rises above its freezing point, causing the solid structure of ice to break down and transition into a liquid state. This physical change involves the absorption of heat energy, which allows the molecules of ice to gain enough energy to overcome their rigid arrangement. Melting is a common phenomenon observed in nature, such as during warm weather when snow and ice melt. It plays a significant role in the water cycle and is important for various ecosystems and human activities.