What is Air It's a GAS! Mostly Nitrogen= 78% Oxygen = 21%
{"Image DocumentName": "What is Air? It\u2019s a GAS! Mostly Nitrogen= 78% Oxygen = 21%", "Image ImageDescription": "Argon = about 1% Trace amounts of other gases. Since air is a gas, it is matter \u2013 which means it has mass and occupies space. In the picture, you see the composition of Earth\u2019s atmosphere ( 78% N2, 21% O2, 1% Ar, with trace amounts of elements in lower chart) Photo:  s_atmosphere. Composition of Earth\u2019s Atmosphere.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}