1. Temperature faster hotter goes up Particles are always moving.
When water is heated, the water molecules move ______
When molecules move faster, the substance gets ______
When a substance gets hotter, its temperature ________
faster
hotter
goes up

2. Temperature Measures the hotness or coldness of an object
Determined by using a thermometer that contains a liquid that expands with heating and contracts with cooling.

3. Units of Temperature between Boiling and Freezing
Fahrenheit Celsius Kelvin
Water boils °F °C K
180°F °C K
Water freezes 32°F °C K

4. Learning Check A. Temperature of freezing water 1) 0°F 2) 0°C 3) 0 K
B. Temperature of boiling water
1) 100°F ) 32°F ) 373K
C. Number of Celsius units between the
boiling and freezing points of water
1) ) ) 273

5. Fahrenheit Formula 180°F = 9°F = 1.8°F 100°C 5°C 1°C
Zero point: °C = 32°F
°F = 9/5 °F/°C (T°C) or
°F = 1.8 °F/°C (T°C)

6. Celsius Formula Rearrange to find T°C °F = 1.8 °F/°C (T°C) + 32
°F = T°C
1.8 °F/°C

7. Temperature Conversions
A person with hypothermia has a body temperature of 29.1°C. What is the body temperature in °F?
°F = (29.1°C)
exact tenth's exact =
= 84.4°F
tenth’s

8. Learning Check 1) 73.8 °C 2) 58.8 °C 3) 41.0 °C
The normal temperature of a chickadee is 105.8°F. What is that temperature in °C?
1) °C
2) °C
3) °C

9. Solution Solution: °C = (°F - 32) 1.8 °F/°C = (105.8°F - 32) = 73.8°F
1.8 °F/°C = °C

10. Units of Temperature between Boiling and Freezing
Fahrenheit Celsius Kelvin
Water boils °F °C K
180°F °C K
Water freezes 32°F °C K

11. Kelvin Scale On the Kelvin Scale 1K = 1°C 0 K = - 273°C
0 K is the lowest possible temperature: no molecular motion
K °C
K = °C

12. Learning Check
What is normal body temperature of 37°C in kelvins?
1) 236 K
2) K
3) 342 K

13. Solution 2) 310. K K = °C + 273 = 37 °C + 273 = 310. K
What is normal body temperature of 37°C in kelvins?
2) K
K = °C + 273
= 37 °C
= 310. K