Temperature

Temperature

Temperature is a physical property that quantitatively expresses the common notions of hot and cold. Objects of low temperature are cold, while various degrees of higher temperatures are referred to as warm or hot.

Temperature is measured with thermometers, which may be calibrated to a variety of temperature scales. Much of the world uses the Celsius scale for most temperature measurements. The Kelvin scale is the temperature standard for scientific or engineering purposes. It has the same incremental scaling as the Celsius scale, but fixes its origin, or null point, at absolute zero (0K = −273.15°C). Few countries, most notably the United States, use the Fahrenheit scale for common purposes, a historical scale on which water freezes at 32°F and boils at 212°F.

meter：Celsius / Kelvin / Fahrenheit 

standard：Thermometer