= Thermal expansion
{wiki=Thermal_expansion}
Thermal expansion refers to the tendency of matter to change its shape, area, and volume in response to changes in temperature. As the temperature of a substance increases, its particles move more rapidly, leading to an increase in the average distance between them. This results in the expansion of the material. Thermal expansion occurs in all states of matter—solids, liquids, and gases—but the degree of expansion can vary significantly among different materials.
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