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After the Big Bang, the atmosphere of earth was comprised of mostly hydrogen, radiation and helium. These are the gases associated with the interior of the planet. Over time, as life appeared on earth, oxygen began forming, and other dangerous gases began receding.
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∙ 9y ago
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What would Earth's atmosphere be like today if life had not evolved on Earth?
It might be similar to the atmosphere on Venus, where the oxygen has combined with surface rocks and as carbon dioxide. On Earth, plants remove carbon dioxide and increase the level of free oxygen that supports animal life. This atmosphere also reduces ultraviolet radiation, which also affects the level of gases.
Is the air you breathe now the same air since creation?
Creation of what, the earth? There was no atmosphere at creation. No air. The oxygen we breath today was created by living plants that populated the earth long before we evolved
How did oxygen come into the atmosphere according to evolutionists?
Scientists agree that significant amounts of oxygen were first put into the atmosphere by cyanobacteria which used and still use a process called photosynthesis to convert carbon dioxide and water into sugar and oxygen. The sugar is then used to build cell walls and in the metabolism. When plants evolved, they too carried out photosynthesis, putting even more oxygen into the atmosphere. Prior to the evolution of cyanobacteria, the metabolisms of organism relied on anaerobic processes.
what substance in the upper atmosphere is important to temperature changes in the upper atmosphere layers?
it is the ozone layer in the atmosphere because it is what keeps the atmosphere in check of what is happening in the atmosphere.
Where can a large amount of nitrogen be found on the planet?
The greatest concentration of nitrogen on the Earth is found in its atmosphere. The atmosphere is approximately 78 percent nitrogen.
What changed the composition of the ancient atmosphere on Earth?
When plants and animals evolved, this made changes in the atmosphere on Earth
Before photosynthesis evolved was oxygen rare in Earth's atmosphere?
carbon dioxide
What is main cause of earths atmosphere changing over time to support life?
Green plants evolved adding oxygen to the atmosphere.
Why are deserts organisms most likely brownish color?
Because they are evolved in that atmosphere. As they living there from millions of years so it is possible to evolved purely. Also its a camouflage in the sandy surrounding.
Has the atmosphere always had the same compisition?
No, it has changed over time. Ex) There was no oxygen when the first organisms evolved.
Why percentage of nitrogen in air is higher?
That's simply the way earth's atmosphere evolved. And fortunate for us - if the earths atmosphere was 100% oxygen, the planet would have burst into flames long ago! Earth's atmosphere is 79% Nitrogen.
How is the smoke evolved from crackers damaging the ozone layers of the atmosphere?
NO, smoke evolved from cracker doesn't effect ozone layer because it does not have gases like chlorofluorocarbon that is responsible for diplition of ozone layer.
How would earths atmosphere be different if organisms capable of photosynthesis not evolved?
It will remain as reductive atmosphere. Ther will be only gases like NH3, H2 , H2S. H2O. There would be no life
How has the earths atmosphere changed?
The earths atmosphere has significantly altered over the years. The process of the earth's atmosphere was recognized and evolved 2.7 billion years ago, forming the nitrogen-oxygen atmosphere that exists today. This change enabled the formation and beginning of the ozone layer (which along with magnetic fields) block solar radiation.
What happened to life-forms when the ozone layer formed in the upper atmosphere?
When the ozone layer is formed, the life forms evolved. They were not possible earlier.
What process evolved around 2.3 billion years ago that introduced significant amounts of free oxygen to the atmosphere?
water-based photosynthesis
What do you think earths atmosphere would be like today if life had not evolved on earth?
Almost no oxygen, lots of CO2, still mostly nitrogen.
