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Author Question: The gaseous oxygen in the Earth's atmosphere was produced as a by-product of A) volcanic ... (Read 89 times)

mspears3

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on: Jul 14, 2018
The gaseous oxygen in the Earth's atmosphere was produced as a by-product of
 
  A) volcanic outgassing.
  B) photochemical reactions breaking down ozone (O3 ) to form oxygen (O2 ).
  C) photosynthesis.
  D) decay of organic matter.

Question 2

The deepest places in the ocean are those in which rifting occurs.
 
  Indicate whether the statement is true or false


ktidd

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Reply #1 on: Jul 14, 2018
Answer to Question 1

C

Answer to Question 2

FALSE


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