According to the kinetic theory, how does temperature affect the motion of particles?

As temperature increases, the kinetic energy of the particles in a substance also increases, according to the kinetic theory of gases. This theory posits that matter is made up of tiny particles that are in constant motion. The average kinetic energy of these particles is directly proportional to the temperature measured in Kelvin. Therefore, when the temperature rises, the particles move more vigorously and rapidly, leading to an increase in their overall motion.

This relationship is fundamental to understanding how gases behave under different temperature conditions. As temperature increases, we observe phenomena such as increased pressure in a contained gas (when volume is held constant) or the expansion of gases (when temperature is increased in a flexible container). This concept is also applicable to liquids and solids, where increased temperature generally leads to increased molecular motion, which can affect properties such as viscosity and density.

Thus, the correct understanding is that increased temperature corresponds with increased motion of particles, solidifying the reason why the correct answer is that it increases motion with increasing temperature.