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Magnitude of Expansion of Solids, Liquids and Gases Examples of Expansion Summary

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When molecules are heated they move far apart from each other This causes the material to expand Expansion Increase in size of a material due to added heat Contraction Decrease in size of a material when heat is removed

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Let us look at 3 videos on the example of expansion and contraction

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Bimetallic strip as thermometer

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Liquid Expansion as thermometer Road expansion gaps

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Tyre Fitting Opening a Jar

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All materials expand Solids have linear expansion Varies among materials Liquids and Gases have volume expansion Varies among materials

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Solid expansion< liquids< gases When a material changes from solid to liquid, volume does not change much Density is almost the same When a liquid changes to gas, the volume expansion is about 1000 times more Density is divided by 1000