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GCSE
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More cards in this set
Card 6
Front
Why did the oceans form?
Back
Card 7
Front
Why did oxygen levels increase?
Back
Card 8
Front
Why did carbon dioxide levels decrease?
Back
Card 9
Front
By which three processes can carbon dioxide levels be added to and removed from the atmosphere?
Back
Card 10
Front
How does acid rain form?
Back
See full card set
