Yes, that's correct! When the temperature of an object decreases, the average kinetic energy of its particles also decreases. Temperature is a measure of the average kinetic energy of the particles in a substance—higher temperatures correspond to higher average kinetic energies.
As the temperature falls, the particles move more slowly, leading to a reduction in their kinetic energy. This results in a decrease in the overall thermal energy of the object, since thermal energy is the sum of all the kinetic and potential energy of the particles within the object.
In summary, a decrease in temperature typically leads to a decrease in the average energy of the particles and, consequently, a decrease in the thermal energy of the object.
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