The mercury rises in a clinical thermometer when the temperature is increased due to the ___ of the mercury.
A
expansion
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B
contraction
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C
evaporation
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D
sublimation
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Solution
The correct option is A expansion The clinical thermometers are mercury based, consisting of a small bulb filled with mercury and connected to a thin glass neck. As the temperature rises, the mercury expands, causing it to be forced up the neck.