What is Exosphere?
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Answer:
The exosphere is the uppermost region of Earth's atmosphere as it gradually fades into the vacuum of space. The air in the exosphere is extremely thin - in many ways it is almost the same as the airless void of outer space. ... However, other scientists do consider the exosphere part of our planet's atmosphere.
Answer:
As it is the outermost layer of the Earth’s atmosphere and also the widest one, it is aligned at a distance of around 700 km above the sea level and extends up to 1000 km above the sea level. 1000 km above the sea level is the Exosphere’s endpoint, where it meets with the solar wind.
Its functions to act as a transitional medium to a zone under the influence of gravity. It also helps the atoms to escape from the atmosphere to outer space.
Unlike other atmospheric layers, it is the only layer of the atmosphere that has a definite shape. The molecules and gases in the Exosphere are available in a limited quantity. Also, these gaseous molecules are distant from each other. They travel at quite a high speed, and it is the reason they face minimum or negligible or minimum collisions. It is much farther away from Earth than anybody can imagine, and thus there can be no chance of meteorological phenomenon.
Explanation: