Assertion : Earth has an atmosphere but the moon does not.
Reason : Moon is very small in comparison to earth.

Why does the earth have an atmosphere and the moon does not?

Why does the earth has an atmosphere where as moon has none ?

Assertion : There is no atmosphere on the moon. Reason : The escape velocity on the surface of moon is very small. Due to this, molecules of the gases easily escape.

Assertion : Moon has no atmosphere. Reason : The escape velocity for moon is less than that for earth.

Assertion: The earth is slowing down and as a result the moon is coming nearer to it. Reason: The angular momentum of the earth-moon system is not conserved.

Assertion : Two persons can not conversant on Moon. Reason: Moon does not have an atmosphere.

if moon move in an elliptical orbit around the earth. The mass of the moon is very small compared to the mass of the earth because