The expansion of railway tracks is an example of expansion in Solids, the rise of mercury is an example of expansion in and the expansion of balloons is an example of expansion in .

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The expansion of railway tracks is an example of expansion in Solids, the rise of mercury is an example of expansion in liquids, and the expansion of balloons is an example of expansion in gases.
Some materials expand when heated, while others contract when cooled. Heating causes the particles to expand or contract. Solids, liquids, and gases all expand differently. Solids expand the least, while gases expand the most. The expansion of railway tracks is an example of solid expansion, and mercury expands when heated. A rise in the level of mercury is an example of liquid expansion. If you leave an inflated balloon in the sun for a while, it will expand in size. It is an illustration of gas expansion.

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