Explain how the liquid in a thermometer changes so that it can be used to measure a temperature. Try to give a good answer.
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A thermometer has a glass tube sealed at both ends and is partly filled with a liquid like mercury or alcohol. As the temperature around the thermometer's bulb heats up, the liquid rises in the glass tube. ... When it is hot, the liquid inside the thermometer will expand and rise in the tube.
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the liquid in thermometer is actually a metal liquid form that is mercy which is very sensitive to temperature with very low melting point. as the temperature increases the mercury melts amd goes up and its shows us temperature
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