How Oxygen Increased (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards
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When algae & early plant life appeared
When algae & early plant life appeared
2.7 billion years ago
Process started by early algae & plant life
Process started by early algae & plant life
Photosynthesis
What photosynthesis converts (inputs & outputs)
What photosynthesis converts (inputs & outputs)
CO₂ & water → glucose & oxygen
Energy source for photosynthesis
Energy source for photosynthesis
Sunlight
Chemical equation for photosynthesis
Chemical equation for photosynthesis
Gas that increased from photosynthesis
Gas that increased from photosynthesis
Oxygen (O₂)
Time taken for oxygen buildup in atmosphere
Time taken for oxygen buildup in atmosphere
Millions of years
What oxygen increase enabled
What oxygen increase enabled
Development of more complex life forms
First organisms to carry out photosynthesis
First organisms to carry out photosynthesis
Algae & early plant life
Why oxygen increase was important
Why oxygen increase was important
Crucial step in evolution of life