This printable word search puzzle on the topic of Ecology & Evolution contains 19 hidden words in a 24x24 letter grid. Words go horizontally and vertically. This word search is also available to download as a Microsoft Word document or a PDF.
ultraviolet light
organic molecules
electrical storms
volcanic activity
sulphur dioxide
solar radiation
carbon dioxide
no ozone layer
water vapour
meteorites
lightening
asteroids
no oxygen
hydrogen
nitrogen
helium
comets
oceans
ash