How is density related to atmospheric layering?

Question

How is density related to atmospheric layering?

Answer 1

Yep. Less dense layers are displaced by denser layers, so they end up with the densest layers at the bottom and less dense layers on the top.

In our atmosphere, since warmer air is less dense than cooler air, warmer air rises after absorbing sunlight reflected from the ground. Once in the upper atmosphere it loses its heat and becomes denser again, circulating back down to the bottom. This convection current is a major driving force in global weather patterns, since air masses are always moving based on differences in density.

Answer 2

The more density in each layer places it closer to the suface of the Earth.  Layers farther away have less density.

Answer 3

The coldest, densest air occurs above the level of free convection.   At some point the airmass cools to where it is indistinguishable in the upper atmosphere.  Temperatures at 100mb is much colder and denser than at the surface.  The surface is around 1000mb.