What is meant by the Kinetic Theory of Matter? The Kinetic Theory of Matter:The arrangement and movement of particles in solids, liquids and gases are described in the kinetic theory of matter. The kinetic theory of matter is used to explain the changes in the states of matter. The changes in the states of matter are caused by heating or cooling. For example, ice … [Read more...] about What is meant by the Kinetic Theory of Matter?