Originally the earth had only a small amount of oxygen and abundant carbon dioxide. Primordial green algae first evolved to take advantage of this carbon dioxide and produced the oxygen as a by product. Over billions and billions of years, and as additional plant species evolved, the atmosphere was transformed into the oxygen rich environment we have today.
Theres a bit of oxygen here and there in the solar system, most is locked into solids in molecular form, but earth has an abundance of it in it's atmosphere also. The earth is massive enough to prevent it from escaping into space, mars and Mercury are too small and not massive enough to retain it in the atmosphere (though mars does retain oxygen in the form of a carbon dioxide atmosphere). The earth is also unique in that is has had plant life for millions of years, which has generated an oxygen rich atmosphere.
Elemental oxygen is present on other planets, but only in trace amounts. Oxygen is a highly reactive element and is not very stable in most environments, nor is it easily produced. Earth's oxygen is the product of photosynthesis, a process by which plants and algae use the energy of sunlight to turn water and carbon dioxide into sugar and oxygen. Since no known planet other than earth harbors life, none have notable amounts of atmospheric oxygen.
To have oxygen you must have trees and plants that take in carbon dioxide and release oxygen. The soil and atmosphere on other plants currently does not support plant life. So therefore, the other planets do not have oxygen.
All the planets have oxygen, Earth has a lot of oxygen in its atmosphere due to plants.
the sun helps trees grow and trees make air so thats how
Earth wasn't made with oxygen. The oxygen comes from living things like plants.
That just leaves the question of why only Earth seems to have life!
Other planets do have oxygen. Mars gets it's reddish color from the oxygen in its rocks and soil. Its Iron Oxide which is rust. It would be possible to excavate oxygen from Mar's soil.
Only Earth has any significant amount of oxygen in its atmosphere.
Other planets do have oxygen, but not in as high of concentration as we have here on Earth.
Earth. Only earth so far, maybe mars if there was water and enough oxygen
Venus, Earth, Mars
the direction in which it rotates
Earth, Mars and Mercury are the planets that have oxygen on them.
Earth
Only Earth has any significant amount of oxygen in its atmosphere.
Other planets do have oxygen, but not in as high of concentration as we have here on Earth.
This is because there is absolutely no trees on other planets.Mean while the trees are the propagators of oxygen on earth.hence the absence of oxygen on other planets.
Earth has an ozone layer in atmosphere. It is present in the stratospheric region. Other planets which have oxygen in their environment might have ozone.Some planets like earth do. Others might have.
Earth is only one planet where gaseous oxygen is found. The Earth's atmosphere is about 21% Oxygen.
Earth and Mars has full of oxygen in the solar system!!!!!!
Earth. 80% Nitrogen & 20% Oxygen.
No. Only Earth has a significant amount of oxygen. (I guess you mean oxygen as the gaseous element. Oxygen does occur on other planets in compounds like carbon dioxide.)
The Earth approx. 80% nitrogen 20 % oxygen
I'm not sure, but there is oxygen on most planets, most not having enough for earth organisms to survive.