1. SCIENCE TOPIC 8b

2. What is odd about the relationship between the air’s moisture content and the air’s density?
VERSES

3. What is odd about the relationship between the air’s moisture content and the air’s density?
VERSES
It is an indirect relationship in that as the air’s moisture content increases the density of the air decreases.

4. What is adiabatic temperature change?
T PO
T P
Oh, sure, this is helpful…what is the real answer?

5. Signs of Adiabatic Chages
Time-lapse

6. Adiabatic Temperature Changes

7. An adiabatic temperature change is a temperature change that occurs without adding or taking away new energy.
W HAT?

8. How about this? O X X 300F X X X X O X O X X X X X X X X x 450F 550F
XOXOXXOXXXXXXXXOXOXOXXOXOXXX
XXXXXXOXXXXXXXXXXXXOXXXXOXXXXX
X = AIR MOLECULES
0 = WATER MOLECULES

9. Inversions

10. What are the two conditions needed for condensation to occur?

11. What are the two conditions needed for condensation to occur?
Temperature and dewpoint must meet at the saturation point

12. What are the two conditions needed for condensation to occur?
Temperature and dewpoint must meet at the saturation point
A condensation surface must be available

13. WHAT IS SUBLIMATION?

14. WHAT IS SUBLIMATION?
When a substance changes from a solid to a gas without going through the liquid state…or from a gas to a solid.

15. Oh, you know the answer to this…
WHY IS HEAT GAINED BY THE AIR WHEN CONDENSATION and/or SUBLIMATION OCCURS?
Oh, you know the answer to this…

16. The extra kinetic energy is given off to the air warming it up
WHY IS HEAT GAINED BY THE AIR WHEN CONDENSATION and/or SUBLIMATION OCCURS?
As high kinetic energy water vapor changes back to the low kinetic energy state of a liquid…
The extra kinetic energy is given off to the air warming it up

17. CAN YOU DETERMINE DEW POINT TEMPERATURE AND RELATIVE HUMIDITY?

18. CAN YOU DETERMINE DEW POINT TEMPERATURE AND RELATIVE HUMIDITY?
Sure you can! Just follow the easy directions