A thermometer should be held vertically while measuring temperature to ensure an accurate reading. When held upright, the liquid inside the thermometer, such as mercury or alcohol, moves correctly along the scale, providing an accurate temperature measurement. If the thermometer is tilted, the liquid may not rise or fall properly, leading to incorrect readings. Holding it vertically also helps to avoid any damage to the thermometer and ensures the scale is clearly visible.
This question related to Chapter 7 Science Curiosity Class 6th NCERT.
From the Chapter 7. Temperature and its Measurement.
Give answer according to your understanding.
To prevent inaccurate readings from tilting the liquid column.
Explanation: A vertical position ensures an accurate rise or fall of the liquid inside the thermometer.
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