Although the three states of matter are solid, liquid, and gas, not all substances seem to fit perfectly into one of these groups. Take a look at the substance below and see if you can decide whether ...

A compilation of clips set to background music and based on the theme of solids, liquids and gases. It includes ice, steam, clouds, exhaust fumes, flour, molten glass, steam produced by a train ...

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 ...