Thermal Characteristics
Chemical composition
Movement and density
all of these
Troposphere
Ozone layer
Ionosphere
None of these
Stratosphere
Mesosphere
Thermosphere
The Thermosphere
The Mesosphere
The Troposphere
The Stratosphere
Oxygen
Nitrogen
Carbon dioxide
Argon
Lithosphere
Atmosphere
Hydrosphere
hottest
cool
warmest
frozen