The document instructs students to get their binders and take a seat. It reports that 96% of students answered yesterday's practice questions correctly. The objectives for the lesson are to describe how temperature relates to molecular motion and to convert between the Kelvin and Celsius temperature scales.

1. Launch: 2/3
 Grab your binder and immediately take a seat!
 Place launch paper and yesterday’s practice questions
on your desk.
 Yesterday’s Exit Slip Data:
96%!
 Today’s Objectives: I can describe temperature relates to
molecular motion. I can convert between Kelvin and
Celsius temperature scales.

2. Launch: 2/3
 Grab your binder and immediately take a seat!
 Place launch paper and yesterday’s practice questions
on your desk.
 Yesterday’s Exit Slip Data:
95%!
 Today’s Objectives: I can describe temperature relates to
molecular motion. I can convert between Kelvin and
Celsius temperature scales.

3. Launch: 2/3
 Grab your binder and immediately take a seat!
 Place launch paper and yesterday’s practice questions
on your desk.
 Yesterday’s Exit Slip Data:
97%
 Today’s Objectives: I can describe temperature relates to
molecular motion. I can convert between Kelvin and
Celsius temperature scales.

4. Launch: 2/3
 Grab your binder and immediately take a seat!
 Place launch paper and yesterday’s practice questions
on your desk.
 Yesterday’s Exit Slip Data:
95%
 Today’s Objectives: I can describe how temperature
relates to molecular motion. I can convert between Kelvin
and Celsius temperature scales.

5. Launch 2/3
1. Draw a picture of perfume from a beautiful lady
(or cologne from a gorgeous man) diffusing across
a dance floor to your nose.
• How do the gas molecules move?

6. Launch 2/3
2. After one gas fully diffuses into another, the
gas molecules are
a. slowed down by the increase in ionic interactions.
b. considered to be a heterogeneous mixture.
c. not as likely to react chemically.
d. evenly mixed together and evenly distributed around
their container.

7. Launch 2/3
3. If gas molecules move really fast, why does
it take a few minutes for someone to smell
perfume across a large room?
a. the increase in the airspace occupied by perfume
molecules
b. the chemical reaction with the nerves, with is slower
than other sensory processes
c. intermolecular forces between the air and perfume
molecules
d. random collisions between the air and perfume
molecules

8. Announcements
 Unit #7: Gases
 New unit
 Start of on the right foot
 Quiz on Friday!

9. Monday
February Calendar
LPS Chem, Assessments, Unit Plan
Tuesday Wednesday Thursday
Feb 2010 (Pacific Time)
Friday
1 2 3 4 5
Staff PD No School Gases and Their Properties
Today Quiz!
8 9 10 11 12
Gases and Their Properties
Quiz!
15 16 17 18 19
President's Week No School
22 23 24 25 26
Gases and Their Properties
Exam!

10. Opening
 Today’s Objective: I can describe how the random
collisions between gas molecules creates pressure
on a surface.
 Standard – CH.4.a
 Today’s Questions: What is pressure?

11. What is pressure?
Mr. Heffner
2/4/10

12. What is pressure?
 Pressure is…
 a measure of the force that gases exert on an object
 This force comes from…
 the random collisions of gas molecules with the walls
of a container

13. What is pressure?
 Pressure increases when…
 the # of collisions increases What
 the speed of the gas molecules increases increases the
speed?
…temperature is increased!
Molecular Motion Applet

14. What is pressure?
temperature = collisions = pressure

15. What is pressure?
 Pressure is measured in units of…
1. atmospheres (atm)
 1 atm = pressure @ sea level
2. millimeters of mercury (mmHg)
 760 mmHg = pressure @ sea level
1 atm = 760 mmHg

16. Foldable
 Define the following terms:
1. pressure
2. temperature

17. Practice Questions
 Practice question worksheet

18. Closing
 Today’s Objective: I can describe how temperature
relates to molecular motion. I can convert between
Kelvin and Celsius temperature scales.
 Standard – CH.4.e & CH.4.a
Molecular Motion Applet

19. Exit Slip
1. Temperature measures
a. the height at which gas molecules travel in the
atmosphere
b. the amount of kinetic energy in a substance
c. quantities in units of °G
d. the time it takes for the weather to change

20. Exit Slip
2. Molecules in a substance at 50°C
a. move faster than molecules in a substance at 25°C
because they have less kinetic energy
b. move faster than molecules in a substance at 25°C
because they have more kinetic energy
c. move slower than molecules in a substance at 25°C
because they have less kinetic energy
d. move slower than molecules in a substance at 25°C
because they have more kinetic energy

21. Exit Slip
3. Which of the following is the correct
equation for converting between Kelvin and
Celsius temperature scales?
a. K = °C + 273
b. °C = K + 273
c. K = C + 373
d. °C = K + 373

22. Exit Slip
4. Water boils at 100°C. What is that
temperature in Kelvin?
a. -173K
b. 100K
c. 173K
d. 373K

23. Exit Slip
5. What is the equivalent of 423K in degrees
Celsius?
a. -223°C
b. -23°C
c. 150°C
d. 696°C

24. Homework
 Finish practice questions