Definition of thermometer is an instrument used to measure high or low temperature of an object.
If we use a thermometer, the higher temperature of an object being measured, the higher scale of the thermometer.
The liquid of the thermyometer is usually mercury. Why does it use mercury? This is because mercury is able to absorb heat quickly, easily seen in the glass tube, and it has wide measuring area; new mercury will freeze at the temperature of -39 degrees Celsius and will boil at 375 degrees Celsius. However, you have to be careful with mercury because it is harmful, if you have a thermometer at home, you should keep it out of children’s reach, do not play it then broke and the mercury is out of the glass tube.
Types of thermometers:
1. Celsius Thermometer
Celsius thermometer contains mercury; every one scale indicates the temperature of 1 degree Celsius. So, if it is visible increase in 5 scales then it shows an increase of 5 degrees Celsius and so on. The bottom point of Celsius thermometer is 0 degree Celsius (0C) and the top point is 100 degrees Celsius (100C).
Celsius itself is used to set the temperature unit by a scientist from Sweden named Andres Celsius. So, the term Celsius comes from the name of Andres Celsius.
2. Fahrenheit Thermometer
Seeing the word Fahrenheit, of course it is not the name of Indonesian people. Fahrenheit is the name of a German scientist named Daniel Gabriel Fahrenheit, in 1706 he made a thermometer with mercury content that the bottom point of the thermometer is 32 degrees Fahrenheit (32F) and the top point is 212 degrees Fahrenheit (212F).
3. Reamur Thermometer
Reamur is taken from the name of French scientist; Rene Antonie Ferchault de Reaumur. Rene Antonie Ferchault de Reaumur is the inventor and creator of Reamur thermometer scale. The content of this Reamur thermometer is also mercury with the bottom point 0 degree Reamur (0R) and the top point 80 degrees Reamur (80R).
4. Kelvin thermometer
Kelvin is taken from the name of a British scientist; Lord William Thomson Kelvin. So, the inventor of Kelvin scale is Lord William Thomson Kelvin. The bottom point of the thermometer is 273 Kelvin (273K) and the top point on the thermometer is 373 Kelvin (373K).
