The earth is able to retain its atmosphere because of _____ – McqOptions

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1.	The earth is able to retain its atmosphere because of _____
A.	the mean velocities of atmospheric gas molecules which is less than that of the earth s escape velocity
B.	the mean velocities of atmospheric gas molecules which is greater than that of the earth s escape velocity
C.	the gravitational effect of the moon
D.	the earth s magnetic field
Answer» B. the mean velocities of atmospheric gas molecules which is greater than that of the earth s escape velocity

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