Unit 9 · Measurement of temperature

Measurement of temperature

ScienceSubject
8 minEstimated read
Activity 9.4

Marking a Celsius scale on a thermometer

Method
  • Take a thermometer.
  • Cover its scale by pasting a white paper over it.
  • Take some pieces of ice in a beaker.
  • Arrange a beaker, burner, stand, etc. required to boil water.
  • Insert the bulb of the thermometer into the melting ice and hold it on a stand for a while. Observe the falling mercury level inside the capillary tube of the thermometer. Mark the point on the paper at which the mercury stops and write 0°C.
  • Make an arrangement to hold the bulb of the thermometer in the steam coming from the boiling water. Observe the rising mercury level inside the capillary tube. Mark the point at which the mercury stops as 100°C.
  • Divide the portion between the two marks into 10 equal parts by drawing 9 lines so that each line represents 10°C. The Celsius scale is ready.
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