Posted by Amanda on Tuesday, July 6, 2010 at 6:47pm.
Study some of these diagrams.
http://www.google.com/images?hl=en&rlz=1G1GGLQ_ENUS374&q=nitrogen+cycle&um=1&ie=UTF-8&source=univ&ei=3bIzTI2qCYKB8gb2s5XJCw&sa=X&oi=image_result_group&ct=title&resnum=1&ved=0CCUQsAQwAA
http://www.google.com/images?hl=en&rlz=1G1GGLQ_ENUS374&q=phosphorus+cycle&um=1&ie=UTF-8&source=univ&ei=BrMzTJ3_D8L78AauqeDICw&sa=X&oi=image_result_group&ct=title&resnum=1&ved=0CCEQsAQwAA
The only difference I got is that it doesn't usually have a gas state.
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