0
The origin of oxygen (and other large elements) is from supernovae.
On the smaller scale, the vast majority of our oxygen comes from ocean plants, from tiny algae to giant kelp. The atmospheric oxygen comes from the decomposition of water and carbon dioxide by organisms that use photosynthesis to make useful molecules in combination with the energy from sun light.
Wiki User
∙ 8y ago
Add your answer:
Earn +20 pts
Where does the free oxygen in Earths atmosphere come from?
The free oxygen bubbled up from the oceans.
If Earths biosphere were younger we would have oxygen in the atmosphere?
Earths atmosphere dose have oxygen in it, without it we would all be dead we require oxygen to breathe.
What are the substances that the earths atmosphere contains?
oxygen
What essentials for life are found in earths atmosphere?
The Earths atmosphere protects the earth from meteors and it tgives us oxygen
What makes up Earth's air?
Nitrogen makes up 78% of the earths atmosphere Oxygen makes up 21% of the earths atmosphere
Where does the free oxygen in Earths atmosphere come from?
The free oxygen bubbled up from the oceans.
If Earths biosphere were younger we would have oxygen in the atmosphere?
Earths atmosphere dose have oxygen in it, without it we would all be dead we require oxygen to breathe.
How much of the earths atmosphere is made up of nitrogen and oxygen?
The earths atmosphere is made up of 78% nitrogen and 21% oxygen
Is most of the earths atmosphere covered with oxygen?
no
What percent of earths atmosphere is oxygen?
97%
What are the substances that the earths atmosphere contains?
oxygen
Was there oxygen in the early earths atmosphere?
yes
What essentials for life are found in earths atmosphere?
The Earths atmosphere protects the earth from meteors and it tgives us oxygen
What makes up Earth's air?
Nitrogen makes up 78% of the earths atmosphere Oxygen makes up 21% of the earths atmosphere
The primative earths atmosphere did not contain?
Free oxygen
What is methane and oxygen?
Gasses found in Earths atmosphere.
What process adds oxygen to earths atmosphere?
Photosynthesis
