0
Within the last few thousand years it's been pretty consistent but with changes mainly in CO2 (higher now than in the recent past).
Within the last billion years, the oxygen content has varied from almost nothing to over 25% (currently about 20%), which gave insects a big boost in the game of survival.
Prior to about a billion years ago, it becomes more of a guessing game, but we can assume that the nitrogen level has stayed fairly constant, that there was no detectable (or free) O2 before the blue-green algae, that CO2 might well have been very high (the sun was cooler in those days, but the Earth still had liquid seas), and that significant free methane might have been around (also some weird sulfur compounds).
Wiki User
∙ 9y ago
Add your answer:
Earn +20 pts
The condition of earths atmosphere at a particular time and place is called?
condition of earth's atmosphere at a particular place and time
Is it true or false that the conditions of earths atmosphere at a particular time and place id called climate?
True
How did earths atsmophere change during the precambrian time?
It changed from a reducing atmosphere containing no free oxygen to an atmosphere containing oxygen. The evolution of life on Earth "terraformed" the planet.
The condition of the atmosphere over a long period of time is called what?
Such is known as its climate.
Earths early atmosphere formed during the early Archean era which gas was generally absent from the atmosphere at that time?
Oxygen Please study this, & don't forget it so you don't have to keep looking up answers .
What do scientists learn about changes that occurred in earths atmosphere a long time ago by studing what?
mold fossils
Is the condition of earths atmosphere at the particular time and place?
condition of earth's atmosphere at a particular place and time
The condition of earths atmosphere at a particular time and place is called?
condition of earth's atmosphere at a particular place and time
What was the earths climate like in the atmosphere during quaternary time period?
there was no quarternary period, so make up a climate for your made up time period.
What is main cause of earths atmosphere changing over time to support life?
Green plants evolved adding oxygen to the atmosphere.
What is the atmoshphere like in the inner planets?
Mercury has no real atmosphere, so it's a bit like the moon in that respect. Venus has a very thick atmosphere of mainly carbon dioxide, it has a huge surface pressure of around 93 bar, around 93 time that of earths. Earths atmosphere is mainly nitrogen (79%) and oxygen (20%) with some carbon dioxide (1%) roughly speaking. Mars has a thin atmosphere, mainly carbon dioxide.
What is a solid that can be found in earths atmosphere?
Smoke, it's hard to see, but it's there at any given time
Is it true or false that the conditions of earths atmosphere at a particular time and place id called climate?
True
How did earths atsmophere change during the precambrian time?
It changed from a reducing atmosphere containing no free oxygen to an atmosphere containing oxygen. The evolution of life on Earth "terraformed" the planet.
Why the sun looks orange in the evening time?
it is a refraction of the earths atmosphere and it's magnetic poles causing a orange tint to appear
The condition of the atmosphere over a long period of time is called what?
Such is known as its climate.
Does Venus have an atmoshpere?
Yes, an incredibly dense one. Mainly of carbon dioxide it is about 90 time more dense than the Earths atmosphere.
