How is ice formed?

Ice is the solid form of water, and water condenses into ice at low temperature. Generally, it will freeze below zero. If there are too many impurities in the water, it can freeze at zero.

Any liquid will become a solid at a certain temperature. At standard atmospheric pressure, when the temperature is lower than 0℃, water will freeze.

The arrangement of water molecules in liquid water is irregular, and after solidification, the arrangement becomes regular. Due to the hydrogen bond, tetrahedral structure is formed between water molecules, which makes the gap between water molecules larger, so the volume of water becomes larger after freezing.

Ice is water in nature. It has three states: gas, solid and liquid. We call liquid water, gaseous water vapor and solid water ice.