Why does Air not escape into …
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Meghna Thapar 5 years, 6 months ago
Light ones, like hydrogen and helium, typically move faster than heavier ones, like oxygen and nitrogen. The light atoms are more likely to reach escape velocity and escape to space. Our atmosphere is a mixture of gases that surround Earth. It is kept in place by the pull of Earth's gravity. If Earth was a much smaller planet, like Mercury or Pluto, its gravity would be to weak to hold a large atmosphere. Earth's gravity is strong enough to hold onto its atmosphere and keep it from drifting into space.
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