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An air thermometer has a bubble of liquid inside the tube and when the air inside of the tube heats up or cools down, the air takes up either more or less space inside of the tube, causing the bubble of liquid to either move upwards or downwards, indicating the temperature.

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An air thermometer uses the expansion and contraction of a liquid, typically alcohol or Mercury, in response to changes in temperature. As the temperature rises, the liquid expands and rises in the thermometer tube, and as the temperature decreases, the liquid contracts and lowers in the tube. This change in volume is then calibrated to display the corresponding temperature on the thermometer scale.

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11mo ago
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Q: How does an air thermometer work?
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