the earth 's atmosphere is made of 23133 percent oxygen by mass & the earth 's atmosphere is made of 1288 percent argon by mass & the earth 's atmosphere is made of 036 percent carbon dioxide by volume & the earth 's atmosphere is made of 0 to 4 percent hydrogen / water vapor by volume & the earth 's atmosphere is made of 78 percent nitrogen by mass  -> earth's atmosphere is made of nitrogen, oxygen, water vapor, argon, and <mask> dioxide