Indoors we watched a Bill Nigh film about atoms, we then went outside to play a game which helped explain what happens to atoms when materials change state.

In a solid the atoms are all clumped together and still ( we were frozen on a freezing day!)

As the solid melts the atoms slowly move around in clumps…

As more heat is applied the atoms begin to move around  more quickly until eventually they EVAPORATE and turn into gas – water vapour..

During CONDENSATION the vapour turned back into a liquid etc.

I demonstrated the states inside eg we conducted  a fair test to find out if more energy is needed to melt ice than chocolate..

and we looked for condensation on a cold can of drink and the windows. All the water evaporated from a damp cloth on the radiator. We have frozen jelly to see what happens when that thaws- not sure!