Here are 36 questions from Chapter 2. 

Initial Post: 5 Points

Select any one question to answer correctly BEFORE a classmate has already answered that one. Use this format:
Question #:
Question Text:
Answer:
Textbook Page(s):
PowerPoint Slide(s):
Narrated Chapter Review Video Timestamps:

Indicate where you found the information in our textbook (with page number), PowerPoint slide numbers, and narrated chapter review video (with the start and end timestamps). If it’s not covered in these references, say so.  Don’t use any other sources.

Make sure you’ve written the correct question number and question text into your reply (or lose points).

Up to 5 points to be the first to answer correctly and completely. 
0 points for answering a question that’s already been selected. 
0 points if copied & pasted from the web. 

Once you’ve posted, double-check to make sure that:
a.  Nobody beat you to that question
b.  You wrote the question number and actual question text
c.  Your answer is complete and correct
d.  You referenced where you found the information in the text, PowerPoint AND narrated PowerPoint video review (pages, slide numbers, timestamps included).
e. Make sure to take a look before the deadline to read comments from other students.  You can always edit your original post to incorporate the suggestions before the first deadline.

Then, comment on at least one classmate’s initial answer using the following format (5 points possible):

1. Is the answer correct and complete?
   b. HOW could the answer be corrected, improved or elaborated (add some new details)?
   c. Are the references correct and complete?
   Note: Just complementing the student will earn zero points. If the original poster’s answer is incorrect or seriously incomplete and you don’t catch the error(s), you won’t get points for your reply.

QUESTIONS

1. 1. What is the atmospheric concentration of Nitrogen in dry air and how does it get there?
2. What is the atmospheric concentration of Oxygen in dry air and how does it get there?
3. What is the atmospheric concentration of Argon in dry air and how does it get there?
4. What is CO2, what’s its current concentration in dry air, and how do we know this is the actual concentration?
5. How does CO2get into the atmosphere NATURALLY?
6. Why does the atmospheric concentration of CO2vary each year?  Which months see the highest and lowest concentrations?
7. What are the main human activitiesthat have allowed the concentration of CO2 to increase over the past 100 years?  
8. What are some of the main effectsin the atmosphere, the oceans and on the land that we see from the increase in CO2 levels?
9. How much of the extra warming of our lower atmosphere has been caused by CO2?
10. What is CH4, what’s its concentration in dry air, and how does it get into the atmosphere NATURALLY?
11. Which human activities have allowed the concentration of CH4 to increase over the past 100 years, and how much of the extra warming of our lower atmosphere has been caused by CH4?
12. What is Tropospheric O3, where do we find it in the atmosphere, which human activities have allowed the concentration to increase over the past 100 years, and which atmospheric issues is this gas associated ith?
13. What are NOx and how do these gases get into the atmosphere NATURALLY?
14. Which human activities have allowed the concentration of NOx to increase over the past 100 years, and which atmospheric issues is this gas associated with?
15. What are SOx and how do these gases get into the atmosphere NATURALLY?
16. Which human activities have allowed the concentration of SOx to increase over the past 100 years, and which atmospheric issues does this cause?
17. What are CFCs, and do they occur naturally?  Which human activities have allowed their concentrations to increase over the past 100 years.
18. Which environmental issues are CFCs associated with?  Has there been any progress in reducing these environmental impacts?
19. Define GHGs and list the major types we discussed in class.   Are these responsible for the Greenhouse Effect or Climate Change…or both?
20. What is the key difference between the terms ‘Greenhouse Effect’ and ‘Climate Change’? 
21. Is there a significant difference between the term ‘Global Warming’ and the term ‘Climate Change’?  Which is used most by the scientific community – and why is this?
22. What is Acid Rain, which atmospheric gases cause this and where does it occur mostly?
23. What is Ozone Depletion, which atmospheric gases cause this, and is it getting worse?
24. What is the Troposphere and where do we find it?
25. What is the Stratosphere and where do we find it?
26. What is weather and how do we measure it?
27. What is climate and how do we measure it?
28. How does Latitude affect climate?
29. How does Elevation affect climate?
30. How do WARM Ocean Currents affect climate?
31. How do COLD Ocean Currents affect climate?
32. How would an area of low pressure and clouds affect climate?
33. How would an area of high pressure and clear skies affect climate?
34. What is the warmest part of the troposphere and why is this?
35. What is the warmest part of the stratosphere and why is this?
36. How does Distance from an ocean affect climate?