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This is quite a controversial topic. After an experiment, scientists believe that the early earth had an atmosphere that contained amino acids, which gave a purplish-pink tinge to the atmosphere and helped life grow. What is most widely accepted is that the early earth was a fiery hot ball made of molten magma.
As meteors hit its surface, the lighter metals floated up and the heavier elements sunk down. This created the first land. Volcanoes that were erupting CO2 created ideal conditions for plant life, that absorbed only CO2, to thrive. Comets that crashed down released water, letting plants absorb its minerals and grow ever more healthily. Life began to grow this way. The land began to cool down.
The plants grew to large numbers, and began to release more oxygen than the amount of CO2 they could take in. Gradually, these plants began to die out. However, with the amount of oxygen they released, the plants lay a foundation for life.
---- A Budding Cryptozoologist
What else can I help you with?
What gas was lacking from earths early atmosphere in the early precambrian?
oxygen
What gas was not part of early earths atmosphere?
oxygen
What gas was not a part of earths early atmosphere?
nitrogen
Was the earths early atmosphere made up of mostly oxygen?
no
What was the major contributor of oxygen to earths early atmosphere?
photosynthsis
When earths early atmosphere formed which gases where lost because earths gravity was too weak?
Hydrogen and helium
What factor contributed to the formation of earths early atmosphere?
energy from the sun,lightening,earths heat triggered chemical reaction for the early gases of the earth combined
What does gas do to some scientist think was missing from earths early atmosphere?
oxygen
What gas do scientist think was missing from earths early atmosphere?
Methane gas
What gas was not found in earths early atmosphere but was produced by photosynthesis?
Carbon dioxide
What molecule was not present in early Earths reducing atmosphere?
Oxygen (O2) was not present in early Earth's reducing atmosphere. It only became abundant in the atmosphere due to the photosynthetic activity of cyanobacteria and other early organisms.
What greenhouse gas used to make up most of earths early atmosphere?
Carbon dioxide used to make up most of Earth's early atmosphere.
