Decaying
germinates
photosynthesis
none of these
Troposphere
Ozone layer
Ionosphere
None of these
Oxygen
Nitrogen
Carbon dioxide
Argon
Lithosphere
Atmosphere
Stratosphere
Hydrosphere
Mesosphere
Thermosphere
hottest
cool
warmest
frozen
The Thermosphere
The Mesosphere
The Troposphere
The Stratosphere