The term used for water that has frozen into a solid is "ice." When water cools to a temperature of 0 degrees Celsius (32 degrees Fahrenheit) or lower, it transitions from a liquid state to a solid state due to a process called freezing. Ice has a crystalline structure and is less dense than liquid water, which is why it floats. Ice can occur naturally as part of weather conditions, forming icebergs, snow, and frost, and it is also intentionally produced for use in beverages, food preservation, and various industrial applications.