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Oxygen makes up about what percentage of earth's air today?
20.9 % (almost 21%)Half a billion years ago the percentage was higher (in the mid-30s) due to abundant plant life. Before photosynthesis evolved, atmospheric oxygen was close to zero & poisonous to the earliest cells.it is 21% oxygen,that is ok because it isn't good to breathe pure oxygen
The highest percentage in the atmosphere is of?
The highest percentage in the Earth's atmosphere is nitrogen, at 78%. Then oxygen(21%) and CO2, 0.9%.
What is the percentage of oxygen at the top of a mountain?
At the top of Mount Everest, the percentage of oxygen in the air is the same as that at sea level (about 21% oxygen). However, atmospheric pressure decreases as altitude increases, and the atmospheric pressure at the summit of Everest is 33% that of sea level.Therefore, there is 66% less oxygen than there is at sea level.
What percentage of a Human is Water and what percentage is Carbon?
About 75% of a human is water, and about 18% is carbon.
What is Earth Gas?
earth gases are that naturaly formed on earth eg. oxygen and the one in are gas boilers that people pump out of the ground is methane.
What is the percentage of oxygen in the Earth's atmosphere by mass?
The percentage of oxygen in the Earth's atmosphere by mass is approximately 21.
What percentage of the Earth's atmosphere is composed of oxygen?
About 21% of the Earth's atmosphere is composed of oxygen.
What percentage of oxygen is present in the Earth's atmosphere?
About 21 of the Earth's atmosphere is made up of oxygen.
What percentage of Earth's atmosphere does oxygen take up?
Oxygen makes up about 21% of Earth's atmosphere.
What percentage of Earth's atmosphere iis oxygen?
21 %
Which of the eight planets has the highest percentage of oxygen?
Earth is only one planet where gaseous oxygen is found. The Earth's atmosphere is about 21% Oxygen.
What is oxygen percentage by weight?
Oxygen makes up about 20.95% of the Earth's atmosphere by weight.
What is percentage of oxygen in earth planet?
The Earth's atmosphere is composed of about 21% oxygen. This oxygen is crucial for supporting life on Earth through processes like respiration and photosynthesis.
What is the approximate percentage of oxygen in the atmosphere?
Earth's atmosphere is about 21% oxygen by volume (for dry air).
What percentage is oxygen compromise of your atmospheric gases?
Oxygen makes up about 21% of the Earth's atmosphere.
What percentage of the air around us is oxygen?
The percentage of oxygen in the atmosphere is 20.75%. The atmosphere has many other elements that we breathe in besides oxygen. Oxygen needs to be present for life on earth.
How much oxygen in the air percentage?
Oxygen makes up about 21% of the Earth's atmosphere.
