Definition of Temperature
Temperature is a measure of the degree of hotness or coldness of a body. It is measured by means of a thermometer. The S. I. Unit of temperature is the Kelvin. However, it is also measured in degree Celsius.
The Thermometer
![File:Thermometer CF.svg - Wikipedia](https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/Thermometer_CF.svg/589px-Thermometer_CF.svg.png)
The thermometer is the instrument used for measuring temperature. There are various types of thermometer, e.g. liquid-in-glass thermometer and the thermocouple. Each one makes use of the change in the physical properties of materials they are made of, to indicate temperature change.
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