1. Temperature ScalesTemperature Scales

2. Objectives
 The Student will investigate scientific
temperature scales
 Compare and Contrast, Fahrenheit,
Celsius and Kelvin scales
 Describe the theoretical meaning of
“Absolute Zero”

3. Key Terms:Key Terms:
 Fahrenheit Scale
 Celsius Scale
 Kelvin Scale
 Absolute Zero

4. Fahrenheit Scale
 A temperature scale used
almost exclusively in the United
States based on what the
human body’s temperature was
thought to be ~ 100o
(98.7o
F)
 Water freezes at 32o
F
 Water boils at 212o
F

5. Celsius Scale
 A scientific scale for recording
temperature that focuses on the
freezing point of water (0o
) and
the boiling point of water (100o
)
at sea level
 Called Centigrade for its 100
graduations

6. Kelvin Scale
 A scientific scale for recording
temperature based on the point
where there is no molecular
movement.
 It starts from absolute zero or -273 o
C
 it increases by the same size degree
increments as the Celsius scale.

7. Absolute Zero
 The Kelvin temperature (-273o
C) when all molecular motion
stops.

8. Conversions:
 To convert from Celsius to Kelvin add
273 degrees to the Celsius
temperature
 0o
C + 273 = 273 K
 To convert Kelvin to Celsius, subtract
273 from the Kelvin temperature.
 373K - 273= 100 o
C

9. It’s Just a Phase:It’s Just a Phase:
Temperature ScalesTemperature Scales

10. Lab Time!
 You now have ~60 minutes to
collect data , fill in graphs and
complete the lab up to and
including page 53.
 Remember to READ
and answer all the
questions!