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Junior Cert: Air and Oxygen

Revison Crossword on Air and Oxygen Link    
Lovely cartoon introduction to oxygen Link Youtube. 2 minutes 5 Star
Another nice overview Link Youtube. 5 minutes 4 Star
An overview from periodic videos Link Youtube. 6 minutes 4 Star
To show that approx one fifth of air is oxygen Youtube. 2 minutes 3 Star
Irish-made video - 10 mins Link It's invisible and we can often take it for granted but our atmosphere contains several important gases that play a role in our relationship with planet Earth. Learn more about the gases in air and the reactions they are involved in. 3 Star
Surfing on the atmosphere Link Cool video. Youtube. 5 Star