1. Temperature and the Kinetic Theory of Matter
Write on right side

2. Kinetic theory of matter
Remember: All matter is made up of atoms
Kinetic theory of matter states that all of these particles are ALWAYS in motion
These particles in motion have Kinetic energy
The faster the particles move, the more kinetic energy they have

3. Solids The particles in a solid are not free to move around much.
They vibrate back and forth in the same position
Are held together tightly by forces of attractions

4. Liquids Move more freely than the particles in solids
Constantly sliding around and tumbling past each other as they move

5. Gases Particles are far apart and move around at high speeds
Particles can collide with one another

6. Temperature
A measure of the average kinetic energy of all the particles in an object
Remember: In colder objects, the particles move slower and in hot objects they move faster

7. Think about it!!!
If an iron is hot, the particles in the solid are vibrating very fast and have high kinetic energy

8. Measuring temperature
Three temperature scales that measure the average kinetic energy:
Celsius
Fahrenheit
Kelvin
In Celsius and Fahrenheit, the unit of measurement is Degrees (°) Ex: 100°F, 32°C
The unit for Kelvin is just called kelvin (K), Ex: 10K

9. Measuring temperature
We use tools called thermometers to measure temperature

10. Comparing Temp. Scales
30 degrees means something different for each of these temperature scales
Turn to page 339 in textbook

11. Use the picture to answer the following questions on a separate sheet of paper:
Answer the questions for each temperature scale:
At what temperature does water boil?
What is room temperature?
What temperature does water freeze?