The arrangement, movement and spacing of particles are different in solids, liquids and gases. Find out more with BBC Bitesize. For students between the ages of 11 and 14. Changes of state To ...

A look at a range of day-to-day examples of separating liquids and solids. This is something that we regularly do with the help of a sieve or filter. Examples include fish being caught in a net ...

Before that time, knowledge of energy states and energy transfers in the liquid and solid states was exceedingly meagre; the subject of luminescence as a whole had a very uncertain theoretical basis.