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When an object is heated, its particles gain energy and move more rapidly, causing them to spread out, leading to expansion of the object. Conversely, when an object is cooled, its particles lose energy and move more slowly, causing them to come closer together, leading to contraction of the object. This expansion and contraction process is due to changes in the average kinetic energy of the particles within the object.

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AnswerBot

1y ago

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