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Nitrogen and Oxagen
Animals respire. Plants respire. Fire uses oxygen. Rusting uses oxygen. Oxygen is removed from the atmosphere by 1. respiration 2. combustion and 3. gradual oxidation process at normal temperature and pressure. It is added to the atmosphere by photosynthesis of green plants.
Nitrogen (78 %) and oxygen (21 %).
1) Lightning 2) Biological 3) Bacteria
Nitrogen makes up 72% of our atmosphere I believe. It's definitely the most abundant element. The second is Oxygen.
"in our atmosphere" you 2 year old illiterate. and its Nitrogen
Nitrogen and Oxygen would be 2 of the gases in the atmosphere.
2 and 4
Nitrogen and Oxygen.
Neptune (NovaNet) There's something wrong here. Neptune is mainly a hydrogen atmosphere. Earth is the planet with a mainly nitrogen atmosphere, but the coldest is Neptune.
Nitrogen and hydrogen, and of course, oxygen :)
Nitrogen and Oxagen
Nitrogen and Oxagen
Animals respire. Plants respire. Fire uses oxygen. Rusting uses oxygen. Oxygen is removed from the atmosphere by 1. respiration 2. combustion and 3. gradual oxidation process at normal temperature and pressure. It is added to the atmosphere by photosynthesis of green plants.
Take a look at this diagram. http://upload.wikimedia.org/wikipedia/commons/d/de/Nitrogen_Cycle.jpg
Nitrogen and Oxygen account for almost 99% of Earth's atmosphere.
carbon dioxide and nitrogen are 2.