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Physically kept there? By gravity, same as all other atmospheric gases.
Chemically kept there in spite of its reactive nature? It's not, really. Atmospheric oxygen readily reacts chemically with other substances all the time. However, plants are continually pumping new oxygen into the atmosphere via photosynthesis in opposition to that trend, and the two processes roughly cancel each other out. (Or did, before combustion of fossil fuels started increasing carbon dioxide concentrations since the dawn of the industrial era.)
If it weren't for photosynthesis, a reactive gas like oxygen would not long remain a component of the Earth's atmosphere.
What else can I help you with?
What percentage of the Earth's atmosphere is composed of oxygen?
About 21% of the Earth's atmosphere is composed of oxygen.
What are he two main components of the atmosphere?
The two major components of the earth's atmosphere are nitrogen and oxygen. There is also trace amounts of hydrogen, carbon dioxide, and other gases.
What percentage of oxygen is present in the Earth's atmosphere?
About 21 of the Earth's atmosphere is made up of oxygen.
What layer of atmosphere holds oxygen in earth?
the layer of the atmosphere that holds oxygen is the troposphere and its pause is tropopause
Do any of the planet have oxygen in their atmosphere?
Yes. There is one planet with oxygen in its atmosphere: our home planet Earth.
Two gases kept in balance in the atmosphere by the proses of respiration?
Oxygen and carbon dioxide are two gases that are kept in balance in the atmosphere through the process of respiration. During respiration, organisms take in oxygen for cellular functions and release carbon dioxide as a byproduct. This exchange helps maintain the balance of these gases in the atmosphere.
Which layer of atmosphere keeps in oxygen?
The troposphere is the layer of the atmosphere that contains the highest concentration of oxygen and is where most weather occurs. This layer extends from the Earth's surface up to around 10-15 kilometers in altitude.
What percent of the atmosphere is oxygen'?
21% of the atmosphere is oxygen.
What is the oxygen content of the atmosphere?
The atmosphere is 79.9% oxygen.
What is meant by modified atmosphere packaging?
Its where the atmosphere in which a product is tored/kept is changed, i.e. oxygen is removed from the air of pre-prepared salads and other gases are added, this makes it MAP
What is an aerobic atmosphere?
the environment which has the availability of oxygen it is called aerobic atmosphere and if the availability of oxygen is not there in atmosphere then it is anaerobic type We live in a aerobic atmosphere which has the oxygen available
Is there oxygen in Mercury?
No, there is no oxygen in Mercury's atmosphere because Mercury does not have an atmosphere.
What is the proportion of oxygen in the atmosphere today?
About 21% of the Earth's atmosphere is oxygen.
What gives more oxygen to the atmosphere?
Plankton gives more oxygen to the atmosphere.
What types of organisms remove oxygen from the atmosphere?
Animals remove oxygen from the atmosphere.
Is the atmosphere partly oxygen?
Yes, oxygen makes up 20.9% of the atmosphere.
What makes molecular oxygen in our atmosphere?
Cyanobacteria make molecular oxygen in our atmosphere.
