What is a tool to measure temperature?

Question: What is a tool to measure temperature?

A thermometer is a tool commonly used to measure temperature. There are digital and traditional (mercury and alcohol) thermometers available. The digital thermometers require a battery to function while traditional thermometers use wax-filled glass tubes sealed with a metal top and a scale printed along the tube. To measure temperature, the thermometer needs to be inserted into the area of interest and then calibrated. After that is done, it can be used to display the temperature.

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