How Carbon Dioxide Decreased (OCR GCSE Chemistry A (Gateway Science Suite)): Quizzes
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10 questions from this quiz
What was the nature of carbon dioxide reduction in Earth's early atmosphere?
What was the nature of carbon dioxide reduction in Earth's early atmosphere?
A gradual process
What two types of factors influenced the reduction of atmospheric carbon dioxide?
What two types of factors influenced the reduction of atmospheric carbon dioxide?
Geological and biological
How did ocean formation help reduce atmospheric carbon dioxide?
How did ocean formation help reduce atmospheric carbon dioxide?
CO₂ dissolved in the oceans
What formed when carbon dioxide dissolved in the oceans?
What formed when carbon dioxide dissolved in the oceans?
Carbonate sediments
What is the chemical formula for limestone?
What is the chemical formula for limestone?
What further reduced atmospheric carbon dioxide levels after ocean formation?
What further reduced atmospheric carbon dioxide levels after ocean formation?
Photosynthesising organisms
Which organisms absorbed carbon dioxide for photosynthesis?
Which organisms absorbed carbon dioxide for photosynthesis?
Plants and algae
Over what time scale did these processes reduce carbon dioxide levels?
Over what time scale did these processes reduce carbon dioxide levels?
Billions of years
When did Earth's atmosphere stabilise into its current composition?
When did Earth's atmosphere stabilise into its current composition?
200 million years ago
What percentage of the modern atmosphere is nitrogen?
What percentage of the modern atmosphere is nitrogen?
78%