Its temperature declines, and it may change phase ... from liquid to solid,
or from gas to either liquid or solid.
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When an object loses thermal energy, its temperature decreases. This loss of thermal energy can occur through conduction, convection, or radiation. As the object cools down, its molecules will slow down and move less vigorously, resulting in a decrease in temperature.
If an object loses thermal energy, its temperature decreases. This is because thermal energy is directly related to the object's temperature. As the object gives off energy, its molecules move more slowly, resulting in a lower temperature.
As an object's temperature rises, its thermal energy increases. This increase in temperature indicates that the particles within the object are moving faster and have more energy. The thermal energy is directly related to the kinetic energy of the particles in the object.
it gains more energy
When an object gains thermal energy, its internal energy increases, causing its temperature to rise. This increase in thermal energy can cause the particles within the object to move faster and potentially change state (e.g., from solid to liquid).
When an object loses thermal energy, its temperature decreases. This is because thermal energy is the energy associated with the random motion of particles within the object, and as these particles lose energy, they move more slowly, resulting in a decrease in temperature.