Temperature

How Hot is it?

TemperatureTemperature is a measure of the average kinetic

energy of a molecule of a substance, or… How “hot” it is.On Temperature Scales a higher number of degrees

indicates that a substance’s molecules are moving faster

The lowest possible temperature is when the molecules don’t move at all.

This is called Absolute Zero.

Temperature ScalesThere are 4 Temperature Scales:Fahrenheit: Water freezes at 32°F Boils at 212°F

Absolute Zero is about -460°F Celsius(Centigrade): Water Freezes at 0°C

Boils at 100 °CAbsolute Zero is about -273 °C

A Celsius Degree is nearly twice a Fahrenheit degree.Rankine: uses Fahrenheit degree, Absolute Zero = 0 °R

(almost no-one uses it)Kelvin : uses Celsius Degree, Absolute Zero = 0 °K This is commonly used by astronomers