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There are few reasons for this first of all terrestrial animals can only breath oxygen if it is in a right quantity mixed with other gases. pure oxygen acts like poison. Second reason is if there is a fire then there would not be sufficient amount of other gases to control over it and it spread drastically. the nitrogen present in the atmosphere controls the fire. Human beings can only reproduce if there is a fixed amount of oxygen in the atmosphere.
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The highest percentage in the atmosphere is of?
The highest percentage in the Earth's atmosphere is nitrogen, at 78%. Then oxygen(21%) and CO2, 0.9%.
What are the two most abundant compounds in the atmosphere?
On Earth, about 78% nitrogen and 21% oxygen.
What element in the atmosphere can you not live without?
The atmosphere is made up of 78% Nitrogen, 21% Oxygen , and 1% other gases which are water vapour,argon,carbon dioxide,neon,helium,krypton,hydrogen,and ozone so the number one element we cannot live without is nitrogen and oxygen. -Leesha !
What is the percentage of Oxygen on earth?
Earth contains 21 percent of oxygen in the atmosphere!coz earth contains only hot gases and oxygen is not a hot gas!:D
What are the four main gases in the air?
nitrogen 78%, oxygen 21%, argon .93%, carbon dioxide .03%
Which planet's atmosphere is 78 percent nitrogen?
The Earth has an atmosphere of 78% nitrogen (and 21% oxygen).
Does oxygen make up 78 percent of the gases in the atmosphere?
it doens not
What percent of O and N can you find in the atmosphere?
78% Nitrogen 21% Oxygen
What percent does nitrogen and oxygen makeup in the atmosphere?
nitrogen: 78% oxygen: 21% trace gases: 1%
Its composition is 78 percent nitrogen 21 percent oxygen and 1 percent other?
The earth's atmosphere at sea level.
Is 21 percent of the earth's atmosphere nitrogen?
No, 21% of Earth's atmosphere is oxygen. Nitrogen makes up 78%.
99 percent of the atmosphere is made out of?
78% nitrogen gas 21% oxygen gas
Why nitrogen is 98 percent in environment as oxygen is 21 percent?
Nitrogen makes up 78% of the atmosphere, not 98%.
What is the percentage composition of nitrogen in the air?
78 percent Air is mostly gas The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.
What two elements comprise 99 percent of the volume of the Earth's atmosphere?
Earth's atmosphere is roughly 78% Nitrogen & 21% Oxygen.
What is over 99 percent of the atmosphere in pure dry air composed of?
Nitrogen 78%, oxygen 21%
What is 78 percent of earths atmosphere composed of?
Nitrogen makes up about 78 percent of Earth's atmosphere.
