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Two gases that probably existed in Earth's early atmosphere are what?
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What gases were probably abundant in the earths early atmosphere?
on ancient Earth, nitrogen, water vapor, carbon dioxide, and methane were probably the most abundant gases in the atmosphere.
Earths early atmosphere was changed dramatically by the evolution of?
photosynthesis
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.
Minerals in old rock suggest that earths early atmosphere had little or no free oxygen?
Yes
Which gases made up most of Earths early atmosphere?
mostly carbon dioxide with little or no oxygen.
What gases were probably abundant in the earths early atmosphere?
on ancient Earth, nitrogen, water vapor, carbon dioxide, and methane were probably the most abundant gases in the atmosphere.
Was there oxygen in the early earths atmosphere?
yes
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
Earths early atmosphere was changed dramatically by the evolution of?
photosynthesis
What molecule was not present in early Earths reducing atmosphere?
nitrogen
What added oxygen to earths early atmosphere?
Photosynthesis by plants
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
