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The majority of our oxygen is made by plants. The chlorophyll reaction (photosynthesis) splits water into hydrogen and oxygen. The hydrogen is used by the plant to make more complex biochemicals. The oxygen is a waste product.
By far the majority of this activity is done by tiny plants in the oceans - perhaps 80%.
In primeval times, before photosynthesis had been invented by the plants, the Earth's atmosphere was oxygen poor, and rich in CO2 and methane. This can be discovered by analyzing ancient rocks.
If you wish to follow this thread further, look up 'snowball earth' in a reliable reference source.
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How did Earth come to have an oxygen atmosph?
early organisms created oxygen from other gases in the atomsphere
How much oxygen is used by the earth annually?
The oxygen isn't "used by the earth"; it is recycled by organisms. The total amount of oxygen on planet Earth remains more or less constant.
What language did the element oxygen come from?
What language did the element oxygen name come from
Oxygen is the most abundant element by volume in Earth's?
Oxygen is the most abundant element in Earth's crust.
What will happen when there will be no oxygen in earth?
the earth would die
Where does oxygen come from and why is it important to life on earth?
Oxygen is important as it the breathing sources. It also forms ozone which is vital for life on earth.
How did Earth come to have an oxygen atmosph?
early organisms created oxygen from other gases in the atomsphere
How did earth come have an oxygen atmosphere?
Early organisms created oxygen from other gases in the atmosphere. More specifically, the methane atmosphere on Earth was supplanted by oxygen generated by microorganisms in the oceans. Today, the vast majority of our oxygen comes from the ocean - mainly plants. Earth came to have a oxygen atmostphere because that is the way God invisoned it, so thats how he made it.
Effects of no oxygen on earth?
Oxygen is main gas of earth. If there is no oxygen in the earth all the life in the earth should die.
Do volcanoes have oxygen?
No. A volcano erupts molten material from inside the earth. Actual fire is not involved:the material is hot to begin with and has been since the formation of the earth.
What planets could the elements carbon hydrogen arsenic oxygen neon helium and iron come from?
Earth
Does air come from the sun?
No. Earth's atmosphere most likely originate from volcanic atmosphere. The oxygen is produced by plants.
Where do you get your oxygen on earth?
we get oxygen from the trees
How do rainforests help us when you are ill?
many medicines come from the rainforests
Why can't earth's oxygen travel through space?
Earth's atmosphere, including the oxygen, is bound to Earth by gravity.
What is the diffenerce of earth and space?
There is oxygen and gravitational force on earth but there is no oxygen and gravitational force
How does oxygen make life sutable on earth?
Oxygen makes it human capable of breathing in earth that's why when there is oxygen, there is life.
