The little spheres represent water molecules. Molecules are in constant motion. The attractions water molecules have for each other keep them close together. They can move past each other, but their ...

Students will be able to develop and explain a particle-level model to describe their observations of water dissolving salt, the water evaporating, and the salt crystals re-forming. Dissolving a solid ...

freezing occurs at the top of a water body High boiling point Adhesion of molecules hinders transformation to gas phase Water is a liquid at common temperatures High heat capacity Strong ...