Question

Explain how the in a thermometer changes
temperature
so that it
can used measure a temperature​

Answer 1

Mercury in a thermometer expands when it encounters heat and contracts when there is no heat. The amount of this expansion and contraction is used to measure temperature.

Answer 2

Explanation:

A thermometer has a glass tube sealed at both ends and is partly filled with a liquid like mercury or alcohol. As the temperature around the thermometer's bulb heats up, the liquid rises in the glass tube. ... When it is hot, the liquid inside the thermometer will expand and rise in the tube.