The Hot IceHan CaoAward: Top 100
School: dehong beijing international chinese school This picture shows a phenomenon called a "boiling water challenge" often seen in places where temperatures reach negative -40 degree Celsius and below, where hot water transforms into a cloud of ice crystals while being thrown in the air before landing on ground. This is because the hot water billows so fast that it evaporates very quickly because of the how cold the air is, and the vapor that is created immediately turns into snow while in mid-air as it comes into contact with the freezing temperature of the air. The water should be hot rather than cold because the hot water will evaporate faster and contains less dissolved gas, which enables more of the water vapor to form and freeze in the air. This phenomenon is partly based on the Mpemba Effect, in which hot water can freeze faster than cold water in certain cases. When the sun is shining on the structure, the ambient ice crystals are backlit and the produced effect is stunning; some compare it to a snow or foggy fountain. This beautiful picture demonstrates a wonderful coming together of nature science and cold-season aesthetics. 
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