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Atmospheric oxygen is a result of photosynthesis by plants (including cyanobacteria - blue -green algae - which was responsible for the initial conversion of earth 's atmosphere from its anoxic state) .
Photosynthesis is carried out in plants. It employs energy from the sun and naturally occurring water and carbon dioxide to produce sugar and oxygen gas. The oxygen is released to the atmosphere, and the sugar is formed into plant matter, which it eventually and is buried and turned into coal, oil and gas.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoTrees and plants absorb carbon dioxide and convert it to oxygen.
Wiki User
∙ 8y agoThe oxygen in Earth's atmosphere is mostly released by plants . . . both land plants and a huge mass of water/ocean plants.
Wiki User
∙ 12y agoPhotosynthesis
Wiki User
∙ 12y agoPhotosynthesis
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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
What process adds oxygen to earths atmosphere?
Photosynthesis
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 process adds oxygen to earths atmosphere?
Photosynthesis
What gas was not part of early earths atmosphere?
oxygen
What is the major source of oxygen for the earths atmosphere is?
Plants
