Supercooled Water: Two things are required for water to change between its liquid and solid (frozen) state: Temperatures below freezing (0°C/32°F at standard atmospheric pressure) and a nucleation site for the ice crystals to grow upon. If water is cooled slowly to below its freezing point in a smooth container that lacks ideal nucleation sites, it will not immediately transition into its solid state. However, as soon as the container is jostled a nucleation site can form and the entire volume will move into its temperature-appropriate state. Interestingly, if the temperature of the supercooled water was -10°C, it will almost immediately warm to 0°C as it converts from the liquid to solid state. Sources: C. Sullender and easilen #science #liquid #solid #nucleation #GIF