1. Air Pressure
By Mrs. S. Deringer

2. Air Has Mass
I knew I shouldn’t have eaten all that air.
AIR
AIR

3. What is in the Air?
People generally believe that air is made mostly of oxygen. In fact, they frequently use the terms "air" and "oxygen" interchangeably. This is a misconception. The content of oxygen in the air is relatively small when compared to the gas nitrogen.

5. Air Pressure is . the force that air molecules push down on a surface.
Hey!!
Get away from me!
AIR
AIR
It’s all around us. . . Like it or not…
AIR
AIR
AIR

6. Air Pressure is

7. Air Pressure
is not the same everywhere on earth.

8. 3 Things that affect Air Pressure are
Humidity
Altitude
Temperature

9. Altitude Air pressures decreases whenever, or increases. Temperature
Humidity
Altitude

10. Temperature Affects Air Pressure
lower
Warmer air brings ______ air pressure.

11. Temperature Affects Air Pressure

12. Altitude Affects Air Pressure
As the altitude the
air pressure
increases
decreases
The people at the bottom of the pyramid can feel all the weight and pressure of the people on top (high pressure). The person on the top doesn’t feel any weight (less pressure)

13. Humidity Affects Air Pressure
In addition to gases, the air also contains
moisture.
As the humidity or moisture in the air increases the air pressure
decreases

14. In Low Air Pressure, the air molecules are moving and are apart.
fast
far

15. In High Air Pressure, the air molecules are moving and are .
slow
close together

16. Could Air Crush a Metal Tank Car ?????
The inside of this tank car was washed out and cleaned with HOT steam. Then all the outlet valves were shut . The tank car was sealed. All the workers went home for the evening. In the morning when they returned this is what they found.
This tank car was smashed, crushed, or collapsed by an unseen force why?

17. Can Crushing Experiment

18. Air pressure Air pressure Air pressure decreases decreases decreases
As temperature increases . .
As altitude increases . .
As humidity increases . .
Air pressure
Air pressure
Air pressure
decreases
decreases
decreases

19. Low Air Pressure L
Low air pressure brings
PRECIPITATION

20. H skies High Air Pressure fair
High air pressure brings clear and weather.
fair

21. High and Low Pressure

22. A is used to measure air
barometer

23. Air Masses and Pressure

24. Air Pressure Review precipitation clear decreases decreases decreases
A low pressure system brings ___________ weather.
A high pressure system brings __________ weather.
As the humidity or amount of moisture in the air increases the air pressure _________.
As the air temperature gets warmer the air pressure ___________.
The higher up you go air pressure ___________.
In high air pressure the air molecules are moving __________ and are _________________.
In low air pressure the air molecules are moving __________ and are ______________________.
A ____________________ measures air pressure.
clear
decreases
decreases
decreases
slow
close together
fast
far apart
barometer