Question : The final boundary between the Earth and the outer space is called ____.
Option 1: magnetosphere
Option 2: ionosphere
Option 3: mesopause
Option 4: magnetopause
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Correct Answer: magnetopause
Solution : The correct answer is magnetopause.
The magnetopause is a line that separates the Earth's magnetic field from the solar wind. Solar winds are a component of outer space, although Earth's atmosphere extends up to the magnetosphere. Chapman and Ferraro first proposed this boundary in 1931.
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