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 ...

It uses chemical symbols from the periodic table to represent the elements involved ... in the brackets show which substances are solid, liquid, gases, or dissolved solution.

and are more compressible than solids and liquids. Industrial gases are comprised of elements, molecular compounds, or mixtures. The most common industrial gases are oxygen, hydrogen, nitrogen, carbon ...

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 ...