Fahrenheit

Fahrenheit is a temperature scale that assigns water’s freezing point 32 degrees and its boiling point 212 degrees at standard pressure.

Temperature: Temperature is a physical quantity that characterizes thermal state and determines the direction of heat flow. Fahrenheit is one way to assign numerical values to temperature.
Fahrenheit–Celsius conversion: Fahrenheit–Celsius conversion translates temperatures between the two scales using a linear equation. The equation accounts for Fahrenheit’s shifted zero and larger degree interval.
Daniel Gabriel Fahrenheit: Daniel Gabriel Fahrenheit was a German-Polish physicist and instrument maker who developed the Fahrenheit temperature scale. He created the scale and improved practical thermometers.
Weather forecasting: Weather forecasting uses observations and models to estimate future atmospheric conditions. Fahrenheit is commonly used for public air-temperature forecasts in the United States.
Temperature scale: A temperature scale maps thermal states to numerical values using defined reference points and units. Fahrenheit is a scale whose reference points anchor its numerical readings.
Thermometer: A thermometer is an instrument that measures temperature through a calibrated physical response. A Fahrenheit reading depends on calibrating an instrument to that scale.
Mercury-in-glass thermometer: A mercury-in-glass thermometer measures temperature through the expansion and contraction of mercury in a sealed tube. Fahrenheit’s accurate mercury thermometers helped make his scale usable.
United States customary units: United States customary units are measurement units widely used in the United States, including miles, pounds, and degrees Fahrenheit. The scale persists within the country’s everyday measurement conventions.
Celsius: Celsius is a temperature scale that sets water’s freezing and boiling points at 0 and 100 degrees under standard pressure. Its water-based interval is divided into 100 degrees rather than Fahrenheit’s 180.
Thermal expansion: Thermal expansion is the change in a material’s dimensions as its temperature changes. Many traditional thermometers convert expansion into a Fahrenheit reading.

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