EARTH SCIENCE
CLIMATE AND ENVIRONMENTAL CHANGE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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78%
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0%
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21%
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1%
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Detailed explanation-1: -According to NASA, the gases in Earth’s atmosphere include: Nitrogen-78 percent. Oxygen-21 percent.
Detailed explanation-2: -It’s a mixture of different gases. The air in Earth’s atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.
Detailed explanation-3: -Atmosphere is the layer of gases surrounding the planet. The major gases present in atmosphere are nitrogen, oxygen, argon, carbon dioxide and other gases in minute quantity. The percentage of oxygen present in atmosphere is 21.
Detailed explanation-4: -So how did Earth end up with an atmosphere made up of roughly 21 percent of the stuff? The answer is tiny organisms known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen.
Detailed explanation-5: -For the above reasons as per data oxygen gas in the atmosphere is 21% of the air. Q. What is the percentage of oxygen present in exhaled air? Q.