Temperature

1. Temperature

2. Temperature Temperature is the measurement we use to quantify the sensations of hot and cold.

3. Temperature What has a higher temperature – a cup of coffee or a glass of iced tea? (this is the ice breaker – pun intended)

4. Temperature What does temperature measure though?

5. Temperature The temperature of an object measures the average kinetic energy of its molecules

6. Temperature If average Kinetic Energy increases, so does temperature

7. Temperature Who has been to a concert before?

8. Temperature What’s happening at a concert here?

9. Temperature The Mosh Pit! What’s going on in the mosh pit?

10. Temperature Using temperature and motion, describe what is it like in a mosh pit compared to watching a concert from a seat

11. Temperature Now imagine all those people in the mosh pit as molecules in a balloon

12. Temperature As the average kinetic energy increases, what happens to the balloon

13. Temperature As temperature increases, so does the average kinetic energy of the molecules. The sizes of the arrows in the balloons represent the amount of kinetic energy of the molecules they contain.

14. Temperature What happens to most materials when you raise the temperature? DEMO

15. Temperature Most materials expand when you raise the temperature. The expansion comes from the increase in molecular motion that goes with the rise in temperature. If atoms are moving around more, they tend to bump each other apart and take up more space.

16. Temperature Have you seen this on a bridge before?

17. In order to prevent damage due to temperature changes, civil engineers use expansion joints in bridges.

18. Temperature What would happen if you blew up a balloon and put it in the freezer? http://www.youtube.com/watch?v=ZvrJgGhnmJo

19. Temperature What is in a thermometer? How does a thermometer work?

20. Temperature

21. The expansion of the liquid in a thermometer is directly proportional to increase in temperature.

22. Temperature Pressure and Temperature Do you know what pressure is? http://www.youtube.com/watch?v=t-Iz414g-ro

23. Pressure is the force applied per area covered.

24. Temperature Let’s look at the relationship between pressure and volume

25. Temperature When you squeeze a fixed quantity of gas into a smaller volume the pressure goes up. How come?

26. Temperature The pressure increases because the same number of molecules are now squeezed into a smaller space.

27. Temperature Now, look around to see about how many students are in this classroom.

28. Temperature If we reduced the volume of the class, let’s say, we moved everyone to the bathroom, describe how that would be.

29. Temperature So if we were bumping into one another, like molecules colliding, how would that affect temperature?

30. Temperature The pressure increases because the same number of molecules are now squeezed into a smaller space. The molecules hit the walls more often because there are more of them per unit of area.

31. Temperature An increase in pressure will result in an increase in temperature And An increase in temperature will result in an increase in pressure.

32. Temperature

33. Temperature There are warning labels on cans of hair spray that say to keep them away from heat Why?

34. http://www.youtube.com/watch?v=77Ej_Ayugxk