Brownian movement.
Particles of matter are always in constant motion.
The question's a little sketchy, but I think you're looking for motion. The particles of matter are always in motion.
The haphazard motion of particles of matter is called brownian motion.
Another word for the measure of the energy of motion of particles of matter is kinetic energy.
Particles that make up matter are in a state of constant motion.
The measure of the energy of motion of particles of matter is called temperature. Temperature is a fundamental property of matter that quantifies how hot or cold an object is based on the average kinetic energy of its particles.
Democritus
Democritus
the particles in matter are in motion at all times. :p
kinetic theory
Temperture
heat