1. Earth’s Atmosphere
By: Mr. Hunter

2. What do you know about the atmosphere?

3. Why is the atmosphere important to me?
The atmosphere is a layer of _____ surrounding Earth.
It contains the _____ you need to breathe.
It protects humans from harmful rays of _____ _____ from the sun.

4. What gasses make up the atmosphere?

5. What else is the atmosphere made up of?
Particles ( dust, ____ _____, sea salt, _____, smoke)
Water

6. Meterstick with balloons at both ends…

7. Demonstration 1. Does air have mass?
2. How does this demonstration show that air has mass?
3. How do you think the atmosphere is held in place?

8. Demonstration
Air does have ____ !

9. Air pressure is _____ closer to the surface of the earth.

10. Earth’s atmosphere is divided into _____ .
Layers end in “_____ “ which means ball.

12. Three Characteristics
Layer
Altitude Range
Temperature Range
Three Characteristics

13. Three Characteristics
Layer
Altitude Range
Temp. Vs. Altitude
Three Characteristics
Troposphere
Stratosphere
Mesosphere
Thermosphere
Ionosphere

14. Troposphere Densest layer Contains 90% of the atmosphere’s total mass
Water vapor, clouds, air pollution, weather, and life forms are found here
Temperatures vary greatly here

15. Thin air with little moisture
Stratosphere
Layered gases
Thin air with little moisture
Temperature rises with altitude because of ozone

16. Temperature decreases as altitude increases
Mesosphere
Middle layer
Coldest layer
Temperature decreases as altitude increases

17. Thermosphere Uppermost layer Temperature increases with altitude
Very high temperatures, but not hot

18. Upper part of thermosphere
IONOSPHERE
Upper part of thermosphere
Made of electrically charged gas particles called ions
Reflects AM radio waves

19. Auroras

20. Poem T S M I

21. “ I thought I saw a blue jay this morning
“ I thought I saw a blue jay this morning. The the smog was so bad it turned out to be a cardinal holding its breath.”
– Michael J. Cohen

22. You know your air is polluted when…

23. What is air pollution?
Contamination of the atmosphere by the introduction of pollutants from _____ and _____ sources

24. Primary Pollutants Dust Sea salt Volcanic gases Ash Smoke Pollen
Carbon monoxide
Chemicals

25. Secondary Pollutants
Secondary pollutants form when primary pollutants react with other primary pollutants or with naturally occurring substances.

26. Secondary Pollutants
Ozone
Smog

27. Good Ozone

28. BAD OZONE Near ground level; harmful to breathe Can damage trees/crops
Hot daylight hours of summer
Comes from burning _____

29. Determine the difference between point and nonpoint-source pollutants.
Pollution
Determine the difference between point and nonpoint-source pollutants.

30. Pollution originating from a single, identifiable source is called point-source pollution.
Pollution that does not originate from a single source, or point, is called nonpoint-source pollution.

31. Point Source or Nonpoint-Source Pollutant?
1. smoke from burning brush
2. ozone
3. chemical wastes
4. haze
5. gases from agricultural industries

32. The pH scale measures how acidic or basic a substance is.
Acid Rain
The pH scale measures how acidic or basic a substance is.
The pH scale ranges from 0 to 14. A pH of 7 is _____.
A pH less than 7 is acidic. A pH greater than 7 is _____.

34. The pH of average rainwater is 5.5.
Acid Rain
The pH of average rainwater is 5.5.

36. What is acid rain’s affect on…
1. plants
2. forests
3. aquatic ecosystems
4. humans

37. Letter
Write a 1-page letter to your legislator explaining the problem of air pollution. Explain three ways to solve the problem.