The temperature of the liquid water is reduced below its freezing point, without becoming a solid. The ice wont form without the presence of a nucleation point (a crystal or impurity around which an ice crystal can begin to grow). However, on contact with another surface, the water instantly freezes. Check out how to make instant ice at home in this video: http://youtu.be/sBFK5-JvBAc
Crystal formations are everywhere! Sugar, salt, ice, diamonds – some take thousands of years to grow, others only seconds. Use evaporation to create intricate crystals in just a few days. This project solves a challenge for the Geologist Skill.