All substances are made from particles, and the forces between the particles are different in solids, liquids and gases. The arrangement, movement and spacing of the particles explain many of the ...

Students are introduced to the idea that matter is composed of atoms and molecules that are attracted to each other and in constant motion. Students explore the attractions and motion of atoms and ...

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 ...