What principle does the kinetic molecular theory describe?

The kinetic molecular theory of matter articulates that particles are always in motion, regardless of their state (solid, liquid, or gas). This ongoing movement influences properties such as temperature and pressure, as temperature is a measure of the average kinetic energy of the particles in a substance. Even in solids, where particles are tightly packed, there is still vibrational movement, indicating that motion is inherent to all matter.

The premise that particles are static is fundamentally opposed to the kinetic molecular theory, as it dismisses the continuous motion observed at molecular and atomic levels. Similarly, the idea that particles only move at high temperatures misrepresents the theory, since even at low temperatures, particles retain some kinetic energy and movement, though diminished. The suggestion that particles do not interact with each other is also inaccurate; the theory accounts for the interactions and forces between particles, which can affect their motion and the state of the matter they compose.