Matter is the "stuff" that makes up the universe. Everything that has mass is matter. In normal everyday life we come across matter in three states, solid, liquid and gas.

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.

Molecules in a gas are more widely dispersed, freely moving around without obstructing one another. In a liquid, however, they rub up against each other, and in a solid they are so packed together ...

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 ...

Solid. Liquid. Gas. The materials that surround us in our normal, everyday world are divided into three neat camps. Heat up a solid cube of water (aka ice), and when it reaches a certain ...

Physics States of matter: The unthinkable forms beyond solid, liquid and gas From time crystals to supersolids, we keep discovering extraordinary new kinds of matter – now the true challenge is ...