The gaseous oxygen in the Earth's atmosphere was produced as a by-product of A) volcanic ...

Author Question: The gaseous oxygen in the Earth's atmosphere was produced as a by-product of A) volcanic ... (Read 43 times)

mspears3

Hero Member
Posts: 586

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

Sr. Member
Posts: 319

Reply #1 on: Jul 14, 2018

Answer to Question 1

C

Answer to Question 2

FALSE

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