A1258609342RDpqE

1
(No Transcript)
2
The chemistry of Global Warming

• September 27, 2004

3
Section Overview

• What is the greenhouse effect?
• Does it exist?
• Why is it important to understand?
• Is our current situation serious?
• What is atomic mass? Molecular mass?
• What is avogadros number? A mole?
• What are greenhouse gases?
• Why are they greenhouse gases?
• What can be done?

4
Today

• Evaluating a skeptic
• Does the greenhouse effect exist?
• What do you know about the greenhouse effect
• Video

5
Evaluating a skeptic

• How do you react to the column?
• Analyze factual content
• for each statement, categorize your response as
• A) have enough information to judge it as a valid
  statement
• B) Having enough information to judge it as an
  invalid statement
• C) Do not have enough information at this time.

6
Lessons from Venus

• Without the atmosphere, average temperatures on
  Venus would be 100oC and Earth should be -18oC.
• Facts
• Venus average temperature is 450oC
• Earth Average temperature is 15oC
• Why are both average temperatures higher than
  Expected?

7
The distribution of energy in solar radiation
above the Earths Atmosphere
39
Relative intensity
53
8
1000
0
500
1500
2000
2500
8
Source Nasa.gov
9
Greenhouse effect.
10
(No Transcript)