Evolution of the Earth's atmosphere Word Search
This printable word search puzzle on the topic of Environmental Science contains 12 hidden words in a 17x17 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.
Description
photosynthesis
carbon dioxide
atmosphere
evolution
nitrogen
hydrogen
volcano
methane
ammonia
oxygen
helium
ozone
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