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Card 6
Front
What percentage of the today's atmosphere is Oxygen?
Back
Card 7
Front
What percentage of today's atmosphere are other gases?
Back
Card 8
Front
What happened to the water vapour in the early atmosphere?
Back
Card 9
Front
Why was there a decrease of CO2 and an increase of O2 in today's atmosphere?
Back
Card 10
Front
What is today's atmosphere affected by?
Back
Card 11
Front
What has happened if there is ever a change of volume of 21%?
Back
Card 12
Front
Why was there a decrease in CO2 in today's atmosphere?
Back
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