Some of the particle diagrams shown in the image seem to imply that there are large gaps between the particles in a liquid. How could you help students to understand that large gaps do not exist ...

INSERT [STATE_CI_03 - particle diagram of a solid, liquid and gas] In the solid state the particles of the substance are packed tightly in fixed positions and are all touching. The particles move ...

Right! Go on then. Let's see. Nice shower Square? Whoa! Cheeky. When water is heated up, it changes state from a liquid to a gas, called steam. And this process is called evaporation. When a gas ...