Solids, Liquids and Gases

What is the difference between solids, liquids and gases? How does each state behave? Chemistry - Atoms And Bonding - Learning Points. The kinetic theory of matter states that particles are in constant motion and there are forces of attraction between them. The attraction between particles in solids is strong and they are packed very close together. The particles in liquids are close together and they don't have a fixed shape. The particles in gases are far apart and have weak forces of attraction between them. A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.