advanced practice nurse a registered nurse having education beyond the basic nursing education and certified by a nationally recognized professional organization in a nursing specialty, or meeting other criteria established by a Board of Nursing.
Quick Answer. The air that makes up Earth's atmosphere contains 20.9 percent oxygen. This is true up to about 70,000 feet above sea level. However, above 10,000 feet, the atmosphere becomes too thin to support human life, even though its proportions do not change much. Continue Reading.
What fraction of air is oxygen percentage nitrogen in the what oxygen? The main elements human body about made up Abundance earth's atmosphere. Standard dry air, which is mainly composed of three gases nitrogen (about 78. Abundance of nitrogen in earth's atmosphere. 233 o224 apr 2017 together, nitrogen and oxygen make up 99. Oxygen, nitrogen, argon, carbon dioxide and other components. Oxygen makes up about 21.