The earths
atmosphere
Chemistry chapter 13
, The Earth’s early
atmosphere
Evidence from gas bubbles trapped into rocks
Volcanoes released CO2, H2O and N2 – these gases formed the early atmosphere (small
amounts of methane and ammonia)
Water condensed to form oceans
When the oceans formed carbon dioxide dissolved in the water and carbonates were
precipitated producing sediments, reducing the amount of carbon dioxide in the atmosph
Algae first produced oxygen
atmosphere
Chemistry chapter 13
, The Earth’s early
atmosphere
Evidence from gas bubbles trapped into rocks
Volcanoes released CO2, H2O and N2 – these gases formed the early atmosphere (small
amounts of methane and ammonia)
Water condensed to form oceans
When the oceans formed carbon dioxide dissolved in the water and carbonates were
precipitated producing sediments, reducing the amount of carbon dioxide in the atmosph
Algae first produced oxygen
