Air

These symbols above are paradigms of the earths atmosphere or air.

Image one - http://commons.wikimedia.org/wiki/File:Oxygen_symbol.svg"http://commons.wikimedia.org/wiki/File:Oxygen_symbol.svg
Image two - http://upload.wikimedia.org/wikipedia/commons/thumb/3/32/Carbon_dioxide_symbol.svg/96px-Carbon_dioxide_symbol.svg.png"http://upload.wikimedia.org/wikipedia/commons/thumb/3/32/Carbon_dioxide_symbol.svg/96px-Carbon_dioxide_symbol.svg.png
Image three - http://upload.wikimedia.org/wikipedia/commons/thumb/d/db/Argon.svg/424px-Argon.svg.png
Image four - http://upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Nitrogen.svg/424px-Nitrogen.svg.png
Image five - http://www.revisionworld.com/files/Periodic_Table.jpg