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1 Did you ever wonder why there was no life when earth began? One reason is that there was no oxygen. Hydrogen and helium were the two gases that made up the earth's early atmosphere.
2 These elements have very small masses. Because of this, they escaped into space. Earth's gravity was not strong enough to hold onto them. The solar wind whipped them away.
3 So, how was our atmosphere formed? You have learned that when a volcano erupts, huge amounts of gases escape. This is called outgassing.
4 Much of this gas is water vapor. Carbon dioxide and nitrogen also erupt from volcanoes. Many scientists think the process of outgassing is what formed our early atmosphere.
What else can I help you with?
True or false there was a great deal of free oxygen in earths atmosphere before the first life forms developed?
false
When did the earth first develop an atmosphere and oceans?
The Earth's atmosphere first developed around 4.5 billion years ago when the planet formed. Oceans began to form around 4 billion years ago as water vapor in the atmosphere condensed and fell as rain, filling the low-lying areas of the planet.
What common gas was not part of Earth's original atmosphere?
Oxygen, now about 20% of the atmosphere, was not part of the original atmosphere of hthe Earth. It was produced by plants, after life developed.
When were canoes first developed?
when were the first canoes developed
Who developed the first alphbet?
The Phoenicians developed the first alphabet
Where were the first robots developed?
The first robots were developed in Japan.
When was the first ROV developed?
the first ROV was developed in 1953
Who developed the first soft-ware and how?
who developed the first soft ware and how
Which country first developed hydroelectricity?
which is the first country developed hydroelectricity
What country developed the first zeppelin?
Germany developed the first Zeppelin
In which state wereThe first kindergarten and vocational schools developed?
The first kindergarten was developed in Germany, and the first vocational schools were developed in the United States.
When was the first atmosphere?
The idea to when first atmosphere was made is difficult. The atmosphere is present from the beginning. This allowed human life on earth.
