How Oxygen Increased (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Practise the cards
10 cards from this deck
When did algae first appear?
When did algae first appear?
Around 2.7 billion years ago
Process used by early algae & plants
Process used by early algae & plants
Photosynthesis
Reactants in photosynthesis
Reactants in photosynthesis
Carbon dioxide and water
Products of photosynthesis
Products of photosynthesis
Glucose and oxygen
Energy source for photosynthesis
Energy source for photosynthesis
Sunlight
Photosynthesis equation
Photosynthesis equation
Gas increased by photosynthesis
Gas increased by photosynthesis
Oxygen (O₂)
Duration of oxygen buildup
Duration of oxygen buildup
Millions of years
What oxygen buildup enabled
What oxygen buildup enabled
Development of more complex life forms
Why oxygen increase was crucial
Why oxygen increase was crucial
Crucial step in evolution of life