Formation of Earth's Atmosphere (AQA GCSE Chemistry): Flashcards

2.7 billion years ago

Algae & early plant life

Photosynthesis

Carbon dioxide ($CO_2$) & water ($H_2O$)

Glucose ($C_6H_{12}O_6$) & oxygen ($O_2$)

$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$

Oxygen ($O_2$)

Millions of years

Development of more complex life forms