atmospheric layer
layer of Earth's atmosphere
mesosphere
layer of the atmosphere
troposphere
lowest layer of the atmosphere
stratosphere
layer of the atmosphere
upper atmosphere
region of the Earth's atmosphere in which air density or atmospheric pressure falls below a technically significant level
ozone layer
region of Earth's stratosphere that absorbs most of the Sun's UV radiation
sodium layer
layer within the Earth's mesosphere
exosphere
outermost layer of the atmosphere
ionosphere
atmospheric layer of Earth
thermosphere
layer of the Earth's atmosphere above the mesosphere and below the exosphere