0
Early organisms created oxygen from other gases in the atmosphere.
More specifically, the methane atmosphere on Earth was supplanted by oxygen generated by microorganisms in the oceans. Today, the vast majority of our oxygen comes from the ocean - mainly plants. Earth came to have a oxygen atmostphere because that is the way God invisoned it, so thats how he made it.
What else can I help you with?
Where did the oxygen in Earth's atmosphere come from originally?
The oxygen in Earth's atmosphere originally comes from the process of photosynthesis carried out by early photosynthetic organisms like cyanobacteria, which released oxygen as a byproduct. Over time, the accumulation of oxygen led to the development of an oxygen-rich atmosphere.
Does air come from the sun?
No. Earth's atmosphere most likely originate from volcanic atmosphere. The oxygen is produced by plants.
What percentage of the Earth's atmosphere is composed of oxygen?
About 21% of the Earth's atmosphere is composed of oxygen.
Billions of years ago how did the earth come to have an oxygen rich atmosphere?
The oxygen in Earth's atmosphere was likely produced around 2.4 billion years ago by photosynthetic organisms such as cyanobacteria, which released oxygen as a byproduct of photosynthesis. Over time, this oxygen accumulated in the atmosphere, leading to the development of an oxygen-rich environment.
What percentage of oxygen is present in the Earth's atmosphere?
About 21 of the Earth's atmosphere is made up of oxygen.
What is the approximate percentage of oxygen in the atmosphere?
Earth's atmosphere is about 21% oxygen by volume (for dry air).
What percentage of Earth's atmosphere does oxygen take up?
Oxygen makes up about 21% of Earth's atmosphere.
What is the percentage of oxygen in the Earth's atmosphere by mass?
The percentage of oxygen in the Earth's atmosphere by mass is approximately 21.
What is the proportion of oxygen in the atmosphere today?
About 21% of the Earth's atmosphere is oxygen.
Which gas forms 21 percent of the Earth's atmosphere?
Oxygen forms 21 percent of the Earth's atmosphere.
How did the oxygen in the atmosphere get there?
The oxygen in Earth's atmosphere has been generated, over geological time, by the plant life on Earth.
Does nitrogen dilute the oxygen in Earth's atmosphere?
No, nitrogen does not dilute the oxygen in Earth's atmosphere. Nitrogen and oxygen are the two main components of Earth's atmosphere, with nitrogen making up about 78% and oxygen about 21%. They coexist in the atmosphere without one diluting the other.
