Essential Chemistry for IGCSE - Particles And Purification (Section 4 - No. 48)
Which statement best describes how a thermometer works?
The liquid expands when it is heated.
The liquid expands when it is cooled.
The liquid contracts when it is heated.
The liquid's volume stays constant.
Explanation
Thermometers measure temperature by utilizing the expansion of a liquid (e.g., mercury or alcohol) as it heats up.
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