When we measure length, we use a ruler; when we measure time, we use a clock; and when we measure temperature, we use a thermometer.
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Thermometry is the process of measuring temperature. The first practical measurement of temperature was developed by Daniel Gabriel Fahrenheit (1686-1736). He invented the first mercury thermometer where the standardized temperature scale was in Fahrenheit.
Another temperature scale is Celcius, invented by Anders Celsius (1701-1744). The Celsius scale is known as a Universal System Unit, it is used throughout science and in most countries. Fahrenheit and Celsius are just two methods to measure temperature, there are others.
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According to the thermometer, at standard pressure, water freezes at 0°C or 32°F and water boils at 100°C or 212°F. On an average, the human body has a temperature of about 36.8°C or 98.2°F.
Activity
Heat and Temperature