The term "ice" refers to a solid form of water that occurs when liquid water cools below its freezing point, typically at 0°C (32°F) or lower. It is characterized by a decrease in temperature and an increase in density, causing it to expand and take on a crystalline structure. Ice can be found naturally in various forms such as snow, glaciers, and icebergs, and can also be made artificially for cooling purposes or recreational activities like skating and hockey.