Author Question: 18) The concentration of carbon dioxide in the atmosphere is ________. A) a small fraction of 1 ... (Read 95 times)

sdfghj

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18) The concentration of carbon dioxide in the atmosphere is ________.
 
  A) a small fraction of 1
  B) approximately 10
  C) approximately 30
  D) approximately 50
  E) approximately 75

Question 2

Over warm oceans, water vapor comprises as much as ________ percent of the volume of the atmosphere.
 
  A) 1
  B) 4
  C) 10
  D) 25
  E) 50


sarahccccc

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Answer to Question 1

Answer: A

Answer to Question 2

Answer: B



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