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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.
Wiki User
∙ 10y ago
Wiki User
∙ 11y agoOrganisms slowly evolved to produce oxygen, releasing it into the atmosphere and thus changing its composition.
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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?
They added carbon dioxide to the atmosphere.
How does volcanoes change the Earth's atmosphere?
it change the earth atmosphere when magma flashes out then the earth surface will be dusty
Is the earth's atmosphere always the same?
No. The early Earth's atmosphere contained a lot of ammonia, for example.
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 gas was not plentiful in earth's early atmosphere?
oxygen
What is one of the gases in the atmosphere of early earth?
dioxide
Earth early atmosphere was first changed by?
photosynthesis
Was there oxygen in the atmosphere of early earth?
No! Stromatolites converted the toxic atmosphere into a breathable one.
Is earth's early atmosphere produced by erupting volcanoes?
no it wasn't
Which of the following gases was NOT present in Earth's early atmosphere?
Hoyaaa
The gases in Earth's early atmosphere came from what?
Volcanic eruptions
What gas was missing from earth's early atmosphere?
probably oxgen
