It was called a centigrade scale because of the 100-degree interval. It is an empirical scale that developed historically, which led to its zero point 0 ☌ being defined as the freezing point of water, and 100 ☌ as the boiling point of water, both at atmospheric pressure at sea level. The Celsius scale (☌) is used for common temperature measurements in most of the world. Temperature scales need two values for definition: the point chosen as zero degrees and the magnitudes of the incremental unit of temperature. ( January 2021) ( Learn how and when to remove this template message) Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources in this section. This section needs additional citations for verification.

the speed of sound, which in a gas is proportional to the square root of the absolute temperature.

air temperature affects all living organisms.

the amount and properties of thermal radiation emitted from the surface of an object.

the rate and extent to which chemical reactions occur.

the physical properties of materials including the phase ( solid, liquid, gaseous or plasma), density, solubility, vapor pressure, electrical conductivity, hardness, wear resistance, thermal conductivity, corrosion resistance, strength.

Many physical processes are related to temperature some of them are given below: Temperature is important in all fields of natural science, including physics, chemistry, Earth science, astronomy, medicine, biology, ecology, material science, metallurgy, mechanical engineering and geography as well as most aspects of daily life.Įffects Average daily variation in human body temperature

It would be impossible to extract energy as heat from a body at that temperature. Experimentally, it can be approached very closely but not actually reached, as recognized in the third law of thermodynamics. The kelvin is one of the seven base units in the International System of Units (SI).Ībsolute zero, i.e., zero kelvin or −273.15 ☌, is the lowest point in the thermodynamic temperature scale. The most common scales are the Celsius scale with the unit symbol ☌ (formerly called centigrade), the Fahrenheit scale (☏), and the Kelvin scale (K), the latter being used predominantly for scientific purposes.

Thermometers are calibrated in various temperature scales that historically have relied on various reference points and thermometric substances for definition. Temperature is measured with a thermometer. Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness.

Interactive thermodynamics 3.2