The arrangement, movement and spacing of the particles explain many of the properties of solids, liquids and gases. Solids, liquids and gases. In a solid like this brick, the particles are ...

It turns out that any material, no matter what it is made of, can exist in one of three forms: solid, liquid or gas. These are categories of stuff that have certain observable properties.

Place a small mound of shaving cream on a paper towel. Look at the shaving cream. Would you call it a solid, liquid, or a gas? Why? One characteristic of a solid is that it keeps its shape without ...

Students explore the attractions and motion of atoms and molecules as they experiment with and observe the heating and cooling of a solid, liquid, and gas.