The atmosphere we breath is actually mostly nitrogen (70% roughly). The 22% of oxygen in the air is used by our body to give the blood cells oxyen which is transported to the parts of the body that use it to make energy by combusting glucose with it. The byproduct, carbon dioxide, is expelled through the lungs. Therefore, the portions of what gases we inhale and exhale are different.
false i keep seeing this answer all over the place with people saying that 78% of the air we breath is oxygen when actually its nitrogen which is 78% and 21% oxygen 1% argon 0.04%(it changes due to humidity) water vapour. no matter what anyone tells you unless its a scientist its 78% nitrogen.
ps: i know this because i just had a science lesson and every textbook and teacher at my high school told me the same.
age 13
yes...sorry, but no, the earth is not mostly made up of oxygen, it is mostly made up of nitrogen, in fact, 78% of the earth's atmosphere is made up of nitrogen
No, Earth's atmosphere is mostly nitrogen, with around 21% oxygen and hydrogen making up much less than 1%.
Atmosphere contain only traces of hydrogen.
No, mainly nitrogen
no it is 78% nitrogen and 21% oxygen
Jupiter. :D
false
False. Cyanobacteria changed earth's atmosphere by removing carbon dioxide and releasing oxygen.
silicon, oxygen, iron and magnesium
false
false
true
false
False; they always contain Carbon
If your question is really about oxygen then it is false. And oxygen is not increasing in the atmosphere. If you are talking about carbon dioxide, a gas that IS increasing in the atmosphere, then it is true. Carbon dioxide is causing the speeding up of global warming.
false
False. Cyanobacteria changed earth's atmosphere by removing carbon dioxide and releasing oxygen.
silicon, oxygen, iron and magnesium
false
no- respiration is the process by which cells break down simple food molecules to release the energy they contain in other words it's FALSE
False!it does contain hemoglobin
no it contains atleast two but can contain more also the question saids "only" so it's false
true