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Download What are the 2 most abundant gasses in Earth*s atmosphere?
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The nitrogen cycle moves nitrogen from the air to the soil, into living things and back into the soil and back into the air. Most organisms can’t use “Free” nitrogen (gas) Nitrogen Fixation: this is the process that changes “free “ nitrogen into useable nitrogen Most nitrogen fixation is done by bacteria (commonly found on plant roots)(legumes) Once nitrogen has been “fixed” it can be used by organisms. Plants and animals absorb the nitrogen Decomposers break down their waste and dead plant material and return the nitrogen back to the soil Bacteria then absorbs the nitrogen and converts it back into “Free” nitrogen gas by the process of denitrification. Nitrogen can cycle through plants and animals many times but eventually is returned to the air A. B. C. D. E. Oxygen and carbon Nitrogen and hydrogen Oxygen and nitrogen Oxygen and ozone This is just a guess A. B. C. D. E. Respiration Condensation Photosynthesis Combustion I’ve fallen and I can’t get up A. B. C. D. E. Nitrogen fixation Denitrification Respiration Evaporation Please, please help me!
