#HTheIGCSE

The particulate nature of matter The states of matter Matter is anything that occupies space and has mass Solids Solids have a definite volume, a definite shape, and are incompressible.  Particles* are arranged  in a regular lattice and vibrate about their mean positions. There is not much separation between the particles. Liquids Liquids have a definite volume, take the shape of the container, and are fairly incompressible. Particles can slide past each other, and there's a bit of separation among the particles. Gases Gases don't have a definite volume or shape and are easily compressible. Their particles move fast in random motion and there's a lot of space among them. Changes in states of matter Explaining changes in states of matter using the Kinetic theory. When we heat the particles, they gain energy. This helps them to gain more kinetic energy and overcome the intermolecular force of attraction. This causes the entire structure of