The major source of free oxygen in the atmosphere is from ________.
A)molten rock
B)water
C)green plants
D)silicate minerals
E)glaciers

Name: The major source of free oxygen in the atmosphere is from ________. A)molten rock B)water C)green plants D)silicate minerals E)glaciers
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Question

Quizplus · Accepted Answer

Green plants, through the process of photosynthesis, produce oxygen as a byproduct. This has been the major source of free oxygen in the Earth's atmosphere for millions of years.

The Major Source of Free Oxygen in the Atmosphere Is