1. Which temperature zone of the atmosphere contains this ozone layer?
The altitude of the ozone layer near the South Pole is 20 kilometers above sea level.
Which temperature zone of the atmosphere contains this ozone layer?
(1) troposphere (3) mesosphere
(2) stratosphere (4) thermosphere

2. Air Pressure CAN CHANGE! The weight of air.
Measured with a barometer in millibars or inches of mercury.
Decreases with altitude (less air).
CAN CHANGE!

3. Air’s density changes with temperature

4. REMEMBER…
heat
HOT IS LESS DENSE

5. What happens to the air over your head as temperature increases?
WARMER atmosphere
HOT atmosphere
COOL atmosphere
What happens to the air over your head as temperature increases?

6. HOT atmosphere
As temperature increases the molecules spread out. There is less mass in the volume.

7. Heat makes molecules expand. Hot air is less dense.
Heat = Air Pressure
21o C
- 4o C
Which coffee can barometer is in the cold air?

8. Storm is warm!

9. Air pressure decreases as
(1) temperature decreases
(2) temperature increases
(3) density increases
(4) air weighs more