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The Earth's atmosphere has gone through a number of changes in temperature and composition over the 4.5 billion years it has been around.
From our point of view, the important change occurred when it became breathable by us (or other animals). That change almost killed everything else alive at the time since oxygen was poisonous to the first life forms on Earth.
About 3 or 4 billion years ago, a bacteria-like life form discovered photosynthesis and gave off oxygen as a poisonous waste.
This photosynthetic prokaryotic organisms that emitted O2 as a waste a precursor to what we now call blue-green alga. After more than a billion years of these bacteria-like things making oxygen, a life form evolved that was able to breath it. Soon after that, we arrived.
Now that humans are hear, there are more temperature and chemistry changes to the atmosphere due to chemical we create that become pollutants and we are working on doubling the concentration of CO2 as a waste gas from burning coal and oil.
What else can I help you with?
How did bacteria change early earths atmosphere?
Earth's early atmosphere was primarily composed of carbon dioxide. Early bacteria used carbon dioxide as a source of fuel and as a result produced oxygen.
How did the 1st bacteria on earth change the atmosphere?
First of all, earth got hit by a mars sized rock called thiea. This gave us the moon which changed our atmosphere. Besides, the earth didn't have an atmosphere before thiea hit it.
Why did the earth's atmosphere change after it was first formed?
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.
How does friction with the atmosphere affect the speed of an artificial satellite?
Satellites in a low orbit, however, are slowed by friction with Earth's atmosphere.
Earth's original atmosphere was made up mainly of water vapor carbon dioxide and .?
The Earth's early atmosphere consisted of Carrbon Dioxide, methane, sulphur, ammonia, nitrogen and smaller amounts (aprox. 0.05%) of other gases.
What was one way that early microbes did not change Earth?
Early microbes did not significantly change Earth's atmosphere or climate because they did not produce enough oxygen as a byproduct of their metabolism to have a large-scale impact on the environment.
What element upon which most modern organisms depend was missing from earth's early atmosphere?
Oxygen was the element missing from Earth's early atmosphere, which eventually accumulated due to early photosynthetic organisms. This change in the atmosphere allowed for the evolution of organisms that rely on oxygen for respiration.
How did stromatolites change the atmosphere of early earth?
Stromatolites, which are ancient microbial structures, played a crucial role in changing the atmosphere of early Earth by photosynthesizing and releasing oxygen as a byproduct. This oxygen accumulation in the atmosphere led to the Great Oxidation Event, which significantly altered the composition of the Earth's atmosphere from reducing to oxidizing.
How did bacteria change early earths atmosphere?
Earth's early atmosphere was primarily composed of carbon dioxide. Early bacteria used carbon dioxide as a source of fuel and as a result produced oxygen.
What explains why oxygen was absent from earth early day atmosphere?
Oxygen was absent from Earth's early atmosphere because the planet's early life forms did not yet produce oxygen through photosynthesis. It wasn't until photosynthetic organisms like cyanobacteria evolved and began releasing oxygen as a byproduct that levels of oxygen in the atmosphere started to increase. This process took millions of years to significantly change the composition of Earth's atmosphere.
Is the earth's atmosphere always the same?
No. The early Earth's atmosphere contained a lot of ammonia, for example.
What molecule could not have been present in an early earth atmosphere and why?
Ozone (O3) could not have been present in an early Earth atmosphere because it is a product of oxygen reacting with ultraviolet radiation. Early Earth's atmosphere lacked the high levels of oxygen needed for ozone formation.
What is one of the gases in the atmosphere of early earth?
dioxide
Earth early atmosphere was first changed by?
photosynthesis
What gas was a thought by Oparin to be part of the early Earth's atmosphere?
He thought that the early Earth's atmosphere contained ammonia, NH3; hydrogen gas, H2; water vapor, H2o; and compounds made of hydrogen and carbon, such as, CH4.
What were the conditions like on the early Earth?
The surface of early earth was mostly molten and volcanic. The atmosphere was hot and highly toxic.
Is earth's early atmosphere produced by erupting volcanoes?
no it wasn't
