1. SCIENCE NEWS The eruption of Mt. Redoubt http://www.avo.alaska.edu/

2. Atmosphere Layers by Height

3. What are the distinct properties of the Atmosphere?
Temperature
Air Pressure
Humidity

4. What is Temperature?
The measure of the average kinetic energy of the particles in a material

5. How is Temperature Measured?

6. Temperature in the atmosphere decreases when altitude increases
What is the relationship between temperature and the atmospheric layers?
Temperature in the atmosphere decreases when altitude increases

8. Temperature InVERSION
In the TROPOSPHERE there is an exception.
Temperature InVERSION

9. Over a localize region, an increase in temperature occurs with an increase in altitude.

10. Effects … FOG

11. Chicago

12. What is Air Pressure?
Pressure exerted on a surface by the weight of the atmosphere above the surface

13. How is air pressure measured?
Barometer
units of millibars (mb)

14. Air pressure in the atmosphere decreases when altitude increases
What is the relationship between air pressure and the atmospheric layers?
Air pressure in the atmosphere decreases when altitude increases

16. Density Remember the candy model?
What does the different size candies represent?
Density

17. Density: The mass of a material in a unit volume.
In the atmosphere because atoms & molecules become farther apart as altitude increase… the density of air decreases with increasing altitude.

18. Reflect on pages 289-293 & today’s lecture submit 2 questions
HOMEWORK
Reflect on pages & today’s lecture submit 2 questions

19. Aurora Borealis and Aurora Australis are Best Observed in Spring
SCIENCE NEWS
Aurora Borealis and Aurora Australis are Best Observed in Spring
Aurora Borealis - Aurora Australis - Northern Lights - Southern Lights
The Aurora Page

20. What is Humidity?
The amount of water vapor in the atmosphere at a given location on the Earth’s surface.

21. 1. Relative Humidity 2. Dew Point
Commonly described in two ways..
1. Relative Humidity Dew Point

22. 1. Relative Humidity
the amount of water vapor in the air relative to the amount of water vapor needed to reach saturation

23. EXPRESSED AS A PERCENTAGE Measured by a …

24. Relative Humidity decreases with increasing temperature.

25. 2. Dew Point
expressed as temperature which air must be cooled at constant pressure to reach saturation

26. Dew Point Chart

27. Relative Humidity & Dew Point talks about saturation
Relative Humidity & Dew Point talks about saturation. What is saturation?
A condition where any addition of water vapor to an air mass leads to condensation

29. Relationship between Temperature, Dew Point & Humidity
Activity:
Suomi Virtual Museum

30. Humidity in the atmosphere depends upon on evaporation & condensation
What is the relationship between humidity and the atmosphere?
Humidity in the atmosphere depends upon on evaporation & condensation

31. What is released when water vapor condenses?
LATENT HEAT

32. The extra thermal energy contained in water vapor compared to liquid water.

33. Within Each Layer

34. Let’s combine all the properties of the atmosphere… altitude, temperature, air pressure, humidity

36. Review The Troposphere Temperature decreases with altitude
Air pressure decreases significantly
Weather & Clouds
The Stratosphere
Temperature increases with altitude
Air pressure decreases rapidly
Ozone Layer, Weather Balloons & Jet planes

37. Mesosphere
Temperature decreases
Air pressure steadily decreasing
Meteors burn up & Rounding rockets
Thermosphere
Temperature increases sharply then steady extreme heat
Air pressure negligible
Space shuttle Orbits & Auroras

38. Read Text p 297-303 From these pages formulate two questions
HOMEWORK
Read Text p
From these pages formulate two questions