1. Temperature,
Thermal Energy and Heat
Temperature
Temperature – measure of the average kinetic energy of the individual particles in matter.

2. Temperature,
Thermal Energy and Heat
Temperature
Temperature changes cause the level of the liquid inside a thermometer to rise and fall.

3. Temperature,
Thermal Energy and Heat
Temperature Scales
The three common scales for measuring temperature are the Fahrenheit, Celsius, and Kelvin scales.
In the United States, Fahrenheit is the most common scale, divided in degrees Fahrenheit (ºF).
In nearly all other countries, Celsius is the most common scale, divided in degrees Celsius (ºC).
The scaled most commonly used in physical science is the Kelvin Scale, with units called kelvins (K).

5. Freezing Point of Water Freezing Point of Water
Temperature,
Thermal Energy and Heat
Temperature Scales
Temperature Scale
Freezing Point of Water
Boiling Point of Water
Fahrenheit
32 ºF
212 ºF
Celsius
0 ºC
100 ºC
Kelvin
273 K
373 K
Temperature Scale
Freezing Point of Water
Boiling Point of Water
Fahrenheit
32 ºF
212 ºF
Celsius
0 ºC
100 ºC
Kelvin
273 K
373 K
Units on the Kelvin scale are the same size as degrees on the Celsius scale. (An increase of 1 K = an increase of 1ºC)
Absolute zero is the temperature at which no more energy can be removed from matter.
It is the lowest temperature possible.
Absolute zero is equal to -273 ºC or 0 K.

6. Measuring Temperature: You Try It!
1. What is the temperature recorded by the thermometer?
Answer: 32 °C

7. Measuring Temperature: You Try It!
3. What is the temperature recorded by the thermometer?
Answer: 21 °C