Gas particles are not found in which region above earth

The earth's atmosphere consists of a layer of different gases held in place by gravity. the atmosphere protects earth by absorbing solar radiation, retaining heat, and regulating temperature extremes. the atmosphere has five different levels: the exosphere, the thermosphere, the mesosphere, the stratosphere, and the troposphere. since there are so many layers and we are limited in space, below are a few ideas to get you started as well as an equation below to you calculate for each layer's weight, which is actually called density.

What are the options? physical property can be color, smell, opacity, viscosity, density, infra red spectrum, melting and boiling points, attraction and repulson to magnets, etc.