1. Temperature
How Hot is it?

2. Temperature
Temperature is a measure of the average kinetic energy of a molecule of a substance, or…
How “hot” it is.

3. On Temperature Scales,
the higher the degree number of the substance’s temperature, the faster the substance’s molecules are moving.

4. The lowest possible temperature is when the molecules don’t move at all.
This is called Absolute Zero.
(As far as we know, this hasn’t occurred yet in our universe.)

5. Temperature Scales There are Four Temperature Scales: Fahrenheit (F⁰)
Celsius/ Centigrade (C⁰)
Rankine (R⁰)
Kelvin (K)

6. Absolute Zero is about -460°F Celsius (Centigrade)
A Celsius Degree is nearly twice the value (9/5) of a Fahrenheit degree.
Fahrenheit
Water freezes at 32°F
Water boils at 212°F
Absolute Zero is about -460°F
Celsius (Centigrade)
Water Freezes at 0°C
Water Boils at 100 °C
Absolute Zero is about -273 °C

7. Rankine
Uses Fahrenheit degree scale
Absolute Zero = 0 °R
(Almost nobody uses it.)
Kelvin
Uses Celsius Degree
Absolute Zero = 0 K (No ° symbol)
Kelvin is commonly used by astronomers.

9. Conversion Formulae for Temperatures
Note: 9/5 is also 1.8!
K = C + 273
C = (F-32) x 5/9
C = K – 273
F = (C x 9/5) + 32