Question

why is the atmosphere densest near the surface?

Answer 1

Hey mate,

The troposphere is the lowermost portion of the earth atmosphere.It is the densest layer of the atmosphere and contains approximately 75% of the mass of the atmosphere and almost all the water vapour and aerosol. The troposphere extends from the Earth surface up to the proper pass where the stratosphere begins.

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Answer 2

Answer:

In the atmosphere, air molecules near the surface of the earth are held together more tightly than the molecules in a higheratmosphere because of the gravitational pull of the earth on all the molecules above the surface molecules