The state of matter is a deceptively simple concept. 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 ...

Using this interactive states of matter diagram, see what happens to the particles inside substances when they are heated and change state. Choose between water, sodium chloride and iron ...

The interactive activity on this page is designed to visualise the states of matter and what happens when substances change state. You can use it to help your revision. There are three main states ...