Question

the motion of the particles in the substance increases, and the temperature of the substance decreases. the motion of the particles in the substance decreases, and the temperature of the substance increases. both the motion of the particles in the substance and the temperature of the substance decrease. both the motion of the particles in the substance and the temperature of the substance increase.

Explanation:

Temperature is a measure of the average kinetic energy of the particles in a substance. When the temperature of a substance increases, the average kinetic energy of its particles increases. Kinetic energy is related to the motion of particles (kinetic energy formula \(K.E.=\frac{1}{2}mv^{2}\), where \(v\) is the velocity of the particle). So, an increase in temperature means that the particles are moving faster (their motion increases). Conversely, when the temperature decreases, the average kinetic energy of the particles decreases, and so does their motion.

Answer:

Both the motion of the particles in the substance and the temperature of the substance increase.