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What two processes contributed oxygen to Earths second atmosphere? Group of answer choices photosynthesis and volcanism volcanism and weathering photosynthesis and photolysis we…

What two processes contributed oxygen to Earths second atmosphere? Group of answer choices photosynthesis and volcanism volcanism and weathering photosynthesis and photolysis we…
asked 58.6k views
3 votes
What two processes contributed oxygen to Earths

second atmosphere?

Group of answer choices

photosynthesis and volcanism

volcanism and weathering

photosynthesis and photolysis

weathering and rainfall

asked
User Ben Birney
by
8.2k points

1 Answer

3 votes

Answer: photosynthesis and photolysis

Step-by-step explanation:

Ez

answered
User Squatting Bear
by
8.2k points
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