Oxygen comprises how many percent of the atmosphere

answer:

By volume, the dry air in Earth's atmosphere is about (78.09 )percent nitrogen,( 20.95) percent oxygen, and (0.93 )percent argon. A brew of trace gases accounts for the other( 0.03) percent, including the greenhouse gases carbon dioxide, methane, nitrous oxide and ozone

answer:

oxygen comprises how many percent of the atmosphere

ANSWER:

21 percent

21 percentThe air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.

Explanation:

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physics: the study of matter and energy and the interactions between them. physicists study such subjects as gravity, light, and time. albert einstein, a famous physicist, developed the theory of relativity.

chemistry: the science that deals with the composition, properties, reactions, and the structure of matter. the chemist louis pasteur, for example, discovered pasteurization, which is the process of heating liquids such as milk and orange juice to kill harmful germs.

astronomy: the study of the universe beyond the earth's atmosphere.

see also: chemistry science projects for beginners, chemistry science projects: intermediate-level, and chemistry science projects: advanced-level

see also: physical science projects for beginners, physical science projects: intermediate-level, and physical science projects: advanced-level

the earth sciences

geology: the science of the origin, history, and structure of the earth, and the physical, chemical, and biological changes that it has experienced or is experiencing.

oceanography: the exploration and study of the ocean.

paleontology: the science of the forms of life that existed in prehistoric or geologic periods.

meteorology: the science that deals with t