Everyday Science Our atmosphere consists of___________ Oxygen approximately? Options:A. 11% Oxygen approximatelyB. 21% Oxygen approximatelyC. 31% Oxygen approximatelyD. None of theseView AnswerB. 21% Oxygen approximately Continue Reading Previous: _________ means a line on a map connecting points having the same atmospheric pressure at a given time or on average over a given period.Next: What is the percentage of salt water on earth surface?