Most of the oxygen is in the troposphere. Stratosphere contains ozone. It is the converted oxygen.
About half of Earth's air is in the troposphere, although it occupies only a fraction of the volume of the upper layers.
The earth's atmosphere is approximatively 21% oxygen (really about 20.95%). 78% is nitrogen. The rest is a small mixture of other gases.
On the contrary, most of the Earth's atmosphere is made up of nitrogen. Oxygen accounts for only 20%.
The Troposhere is the layer of the atmosphere that contains the most oxygen. The whole atmosphere contains 21% of oxygen. Thus 15% of that is in the Troposphere
Oxygen makes up all of the oxygen in the atmosphere.
The stratosphere holds the most of ozone layer. It protects us from the Uv rays of the sun.
It is the troposphere.
stratosphere
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The mesosphere is the coldest layer of the earth's atmosphere.
Answer this question… Earth's atmosphere is 78% nitrogen, 21% oxygen, 0.9% argon, and 0.03% carbon dioxide with very small percentages of other elements. Our atmosphere also contains water vapor. In addition, Earth's atmosphere contains traces of dust particles, pollen, plant grains and other solid particles.
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.
An oxygen free environment may be described as "anoxic" (without oxygen) however the composition of gases in the remaining gases may better describe it:A gas composed of noble gases like argon is called inertA gas which would unite with oxygen or other oxidants is a reducing atmosphereAn atmosphere similar to the Earth;s atmosphere but without oxygen is anaerobic
I'd say the most important gasses in the Earth's atmosphere are oxygen and water vapour.
your question is... How did the Earth`s atmosphere change composotion to became today`s nitrogen and oxygen atmosphere? Answer: it happend with the help of solar untraviolet (uv) radiation,the very thing what we worry about now for its cancer-causing ability
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Nitrogen makes up 79% of the earth''s atmosphere. Nitrogen is in Group 5A.
The mesosphere is the coldest layer of the earth's atmosphere.
Answer this question… Earth's atmosphere is 78% nitrogen, 21% oxygen, 0.9% argon, and 0.03% carbon dioxide with very small percentages of other elements. Our atmosphere also contains water vapor. In addition, Earth's atmosphere contains traces of dust particles, pollen, plant grains and other solid particles.
The air (on ground level, not in a traffic jam!) is composed of ~80% N2, ~20% O2, 0-6% H2O (vary a lot), 0.03% CO2, 1% argon and then traces of other elements. The most abundant element is thus nitrogen N.
The Earthâ??s gases are composed of: Oxygen -21%, Nitrogen-78%, Argon-0.93% and Carbon Dioxide-0.038%. Earth is the only planet that has an atmosphere that can sustain life.
The layer of earth's atmosphere that protects against these dangerous UV rays is ozone. It is in atmosphere.
Early Earth would have been un-inhabitable for humans because early earth's athmosphere would have been mainly carbon dioxide (co2) and water vapour. Then plants appeared which take in co2 and give out oxygen. Then small bacteria etc appeared Once there was enough oxygen in the earth for humans to breath in humans began to develop. So basically in the early earth there was not enough oxygen for humans breath. Improve: Don't forget the molten surface and constant battering by flying rocks!
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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.