A theory regarding the thermodynamic behavior of matter, especially the connections among pressure, volume, and heat in gases. It's based on the dependence of temperature from the kinetic energy associated with quickly going particles of a substance. According to the concept, power and energy tend to be conserved in all collisions between particles, and typical behavior for the particles are deduced by statistical evaluation.
(physics) a theory that gases include little particles in random motion
How would you define kinetic theory?