How Carbon Dioxide Decreased (AQA GCSE Chemistry Combined Science): Flashcards
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How did CO2 reduce in Earth's atmosphere?
How did CO2 reduce in Earth's atmosphere?
Gradual process by geological & biological factors
How oceans reduced atmospheric CO2
How oceans reduced atmospheric CO2
CO2 dissolved, forming carbonate sediments
Carbonate sediment example that removed CO2
Carbonate sediment example that removed CO2
Limestone ()
What photosynthesising organisms did to CO2
What photosynthesising organisms did to CO2
Absorbed it, reducing atmospheric levels
Gas absorbed by plants & algae in photosynthesis
Gas absorbed by plants & algae in photosynthesis
Carbon dioxide
Time scale of CO2 reduction processes
Time scale of CO2 reduction processes
Billions of years
When atmosphere stabilised to current composition
When atmosphere stabilised to current composition
About 200 million years ago
% nitrogen in modern atmosphere
% nitrogen in modern atmosphere
78%
% oxygen in modern atmosphere
% oxygen in modern atmosphere
21%
Effect of water vapour condensation on CO2
Effect of water vapour condensation on CO2
Formed oceans that dissolved CO2