Explain how the liquid in a thermometer changes so that it can be used to measure a temperature. Please answer this quickly.
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should expand uniformly throughout the measuring range and be opaque so that it is clearly visible
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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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