What is thermal expansion?
The increase in size of a substance due to an increase in temperature.
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Which state of matter experiences the least thermal expansion?
Solids experience the least thermal expansion.
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Why do liquids expand more than solids?
Liquids have weaker intermolecular forces, therefore expand more easily.
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Give an example of thermal expansion in everyday life.
Examples:
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What are expansion joints used for?
Expansion joints are used to accommodate the expansion and contraction of materials in structures caused by variations in temperature.
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What happens to the length of a metal rod when it is heated?
A metal rod increases in length when it is heated.
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What happens to the length of a metal rod when it cools?
When a metal rod is cooled, it's length decreases.
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