Post Utme Osustech 2017 Geography Question 8
Practice objective / multiple choice question 8 from the 2017 Post Utme Osustech Geography examination.
The Earth's atmosphere is composed of approximately 78% nitrogen, 21% oxygen, and 1% other gases. What is the percentage of oxygen in the atmosphere?
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About This Question
This is Post Utme Osustech 2017 Geography Question 8. It is one of the objective questions from the 2017 Post Utme Osustech Geography examination.
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