1. Air pressure and the Atmosphere

2. Working with your group….
List 10 facts that you know about:
The air around you
The layers of the atmosphere
Air pressure

3. What is the percentage of N2 and O2 in the air around you?
Nitrogen= 78%
Oxygen= 21%

4. What are the 4 layers of the atmosphere?

5. What is the air pressure at Sea Level?
14.7 Pounds per square inches

6. GREATER
The pressure at the bottom of the pool is ___________ than the top of the pool.

7. The Troposphere
Where does the greatest atmospheric pressure occur?

8. At the bottom of the mountain
Where would the air be the most dense in the picture?

9. Why aren't we crushed by air pressure?
ALL THREE ANSWERS ARE CORRECT!!!
1. air is omni-directional
2. air presses in all directions
3. the air pressure inside of us is equal to the air pressure outside of us

10. High to Low
Air pressure always moves from __________ to ______________.

11. The high pressure outside of the plunger holds it down.
Why was it so hard to pull the plunger off of the table?

12. How does a vacuum cleaner work?
When you turn it on, the fan pushes air out and creates a low pressure inside the vacuum. The High pressure then rushes to get in!

13. The troposphere contains most of the water vapor.
Why do most clouds form in the troposphere?

14. decreases
As elevation increases, air pressure ________.

15. Barometer. Used to measure air pressure.
What is the name of this weather tool?
What is it used for?

16. Watch this video to study a little more….
Click on the barometer!