Author Question: Which two gases make up a combined total of 99 of clean, dry air in the homosphere? A) carbon ... (Read 22 times)

robinn137

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Which two gases make up a combined total of 99 of clean, dry air in the homosphere?
 
  A) carbon dioxide and water vapor B) nitrogen and oxygen
  C) oxygen and carbon dioxide D) nitrogen and argon

Question 2

Who was first to explain the mechanism by which most earthquakes are generated?
 
  What will be an ideal response?



okolip

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Answer to Question 1

B

Answer to Question 2

H. F. Reid of Johns Hopkins University.



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