How Oxygen Increased (AQA GCSE Chemistry Combined Science): Flashcards

Around 2.7 billion years ago

Algae and other early forms of plant life

Converts $CO_2$ & $H_2O$ into glucose & $O_2$ using sunlight

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

Glucose and oxygen ($O_2$)

Carbon dioxide, water, and sunlight

Millions of years

Enabled development of more complex life forms

Oxygen ($O_2$)