This printable word search puzzle contains 19 hidden words in a 24x24 letter grid. Words go horizontally, vertically, backwards, and diagonally. This word search is also available to download as a Microsoft Word document or a PDF.
carbon dioxide
water vapor
trace gases
ozone layer
Sratosphere
troposphere
Ionosphere
mesosphere
Atmosphere
chemicals
exosphere
Nitrogen
weather
Oxygen
smoke
argon
ozone
salt
dust