Water is an essential part of life on Earth, and possibly elsewhere – and now it we know it may have formed not long after ...

High-pressure experiments generated the first direct observation of plastic ice, which has qualities of both crystalline ice and liquid water.

and frost begins to form on the outside of it very quickly. As water freezes, the attractions the water molecules have for one another overcome their motion and hold them in fixed positions. Water ...

After viewing a model of salt, students help develop models for the processes of salt dissolving, water evaporating to form a gas, and salt re-forming as a crystal. The focus is that matter, whether ...