no one in the science category or the earth sciences category answered my question, can someone here help?

Question

my question was........

was the Earth formed with an existing atmosphere, or did it build up over time? if the Earth did not begin with an atmosphere, what stopped the solar winds from destroying and " build up " of atmosphere?

ok, correction, one person answered, but they did not explain wht the solar winds did not destroy any build up. when most believe it takes both atmosphere+magnetic field to deflect solar winds

Answer 1

Though many gasses escaped initially while the planet cooled, the solar winds did not blow away most of the atmosphere on its own, because, as soon as we had a solid, spinning core, the magnetic field of the planet began building up, thus providing a "shield" that kept remaining gasses from being blown away. This occurred about 500 million years after the formation of the earth, though, of course, the composition of the earth was radically different from the modern world.

Answer 2

Both. The early Earth had a higher proportion of light elements including gases. The solar wind has stripped a lot away, but volcanism replenishes atmospheric gases. Gravity and the Earth's magnetic field help sustain the atmosphere.

Since Venus has a much denser atmosphere, lower surface gravity, a weaker magnetic field and is much closer to the Sun, there is no basis to believe that the solar wind would destroy the Earth's atmosphere.

Answer 3

I believe the earth was created with atmosphere on the second day of creation. I also believe it was created differently at creation. Before the flood of Noah the atmosphere of the earth contained more water vapor. This vapor was stored in the upper and middle atmosphere reflecting more heat back down to the earth keeping the whole earth equally warm and keeping solar energy filtered much more adequately than it does now. I think at this point solar radiation did not affect the earth like it does today. We are not nearly as protected now as we would have been then. Some of that water vapor was part of the deluge.

Answer 4

What atmosphere was formed at the early stages of Earth's formation was very different from that of now and gases were probably brought in by the crashing in of planetesimals and comets and asteroids. What solar winds whipped away the frquent bombardment would replace and add to

Answer 5

The earth formed with an atmosphere; the solar wind was not strong enough to blow it all away. The original atmosphere contained nitrogen, methane, carbon dioxide, and water vapor. This took place some 4.6 billion years ago. The conversion to the present oxygen-rich atmosphere took place sometime between 2.7 and 2.4 billion years ago.

Answer 6

I believe it was formed with an atmosphere. And bombardment by comets helped change it. May I suggest the web site reasons.org . There are some papers there, and they have e mail for questions, as well as a live web "radio show" on Tuesdays, that take calls on a toll free number.

Answer 7

You must realize that no one who answers this question was around when the earth was formed. Therefore, no one who answers this question KNOWS the answer. The best we can do is BELIEVE according to whatever evidence we subscribe to. Therefore, if they don't do it themselves, you should preclude every answer you read with, "I BELEIVE that..."

That said...

I BELEIVE that the earth and everything was created in seven literal days by God. The account in the book of Genesis tells of "expanses" and "waters" above and below the expanse. That sounds like atmosphere to me. Besides, all life created on earth seems to need the atmosphere and all it's bennies in order to survive, and could not have developed over time. It had to be here as soon as God said so.

Good question.

Answer 8

That's a problem.

The famous Miller / Urey experiments share this problem. They both eliminated oxygen from their experiment because they knew that oxidation would destroy any amino acids that might form in their test.

So, with oxygen their experiment would fail, and without oxygen, no life could survive.

Being a creationist, I believe the earth's atmosphere was created by God in the first six days of the its existence.

Evolution really has no cold-hard answer for you. This is another one of those "tough nuts" that they put in the "someday we may figure this out" drawer.

Answer 9

yes,........... there was a pre existing atmosphere during earths formation,...... but when solar winds travel,....... much of their heat is expended through natural circulation loss and deflecting planet magnetospheres and the ion tails of comets during circum-navigation.

This causes their extreme temperatures to drop, sufficiently enough to allow the earths atmosphere to develop safely enough to sustain bio organic life on earth.

From that point thereafter,....... solar winds simply diffuse, thin out, then disperses back into the atmosphere.

Answer 10

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