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What molecule could not have been present in an early earth atmosphere and why?
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What molecule was not present in early Earths reducing atmosphere?
nitrogen
What gas did early atmosphere lack?
Oxygen
Was there oxygen in the early earths atmosphere?
yes
What added oxygen to earths early atmosphere?
Photosynthesis by plants
What very important gas was missing in earth's early atmosphere?
Oxygen
What molecule was not present in early Earths reducing atmosphere?
nitrogen
Which of the following gases was NOT present in Earth's early atmosphere?
Hoyaaa
What did Alexander Oparin say about the earth's early atmosphere?
Oparin believed that there was one molecule lightning strike and then the gases developed
What did the early atmosphere contain?
EARLY ATMOSPHERE have humidity
What happened to the water vapour that was in the early atmosphere?
What happened to all the water vapour in the early atmosphere
How was the early atmosphere diffrient from our current atmosphere?
pollution
What did some early cells need to to do so the oxygen they produce could replace the poisonous atmosphere of the earth?
photosynthesis
Which best explains why the first organisms on Earth were anaerobic?
They thought this because the atmosphere contained very little oxygen. Anaerobic means without oxygen and the early atmosphere of the Earth was very low in oxygen. Only those organism that could live without oxygen could survive. Those cells were cyanobacteria which are sometimes (incorrectly) called blue-green algae.
Was oxygen present in early earths atmosphere what elements were present?
oxogen: unkown because of unknown life. elements: everything but pure potassium because that was not made till 1900's because it acts with air
What gas was present in the earths early atmosphere?
The first atmosphere of the earth was probably mostly hydrogen with some simple hydrides such as water vapor, methane and ammonia. Vulcanism and asteroidal bombardment eventually replaced this with an atmosphere of mostly nitrogen, with carbon dioxide and some of the inert gasses.
What was not in the air on earth 3.6 billion years ago?
Oxygen was not present in large amounts in the early atmosphere of Earth.
What gases were there in the early atmosphere?
Oxygen
