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 ...

water has the properties of both a liquid and a gas at the same time. According to one theory, the water molecules form clusters within which they are then connected by hydrogen bonds. The Bochum ...

water has the properties of both a liquid and a gas at the same time. According to one theory, the water molecules form clusters, within which they are then connected by hydrogen bonds.