The evolution of the atmosphere Flashcards
1
Q
How do we think the atmosphere was formed?
A
By volcanoes spitting out carbon dioxide, water vapour and nitrogen.
2
Q
How did oceans form?
A
When water vapour condensed when the earth cooled.
3
Q
How did most of the CO2 disappear?
A
They disappeared by dissolving in oceans and plants removed the CO2 during the process of photosynthesis.
4
Q
How does fossils contain CO2?
A
When plants died an were buried under layers of sediment, The carbon they had removed from the air (CO2) became locked up in sedimentary rocks as fossil fuels
