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What is a thermometer?

Asked by Topperlearning User 14th May 2015, 12:51 PM
Answered by Expert
  • A thermometer is a device that measures the temperature in a reliable manner.


  • It is made of a long, narrow, uniform glass tube with a bulb at one end.
  • The tube appears as a continuous silver line because it is filled with mercury. 
  • Mercury is a metal which is in liquid state at room temperature which expands or contracts.
  • The upper and lower fixed points are marked on the thermometer and the distance between these marks is divided into 100 equal parts.
Answered by Expert 14th May 2015, 2:51 PM
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