Formation of Earth's Atmosphere (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Practise the cards
12 cards from this deck
How long has the modern atmosphere existed in its current form?
How long has the modern atmosphere existed in its current form?
Approx. 200 million years
Percentage of nitrogen (N₂) in atmosphere
Percentage of nitrogen (N₂) in atmosphere
Almost 80%
Most abundant gas in atmosphere
Most abundant gas in atmosphere
Nitrogen
Percentage of oxygen (O₂) in atmosphere
Percentage of oxygen (O₂) in atmosphere
About 20%
What is oxygen's crucial role for living organisms?
What is oxygen's crucial role for living organisms?
Respiration
Definition of trace gases
Definition of trace gases
Gases present in proportions of less than 1%
Example of trace gas: H₂O
Example of trace gas: H₂O
Water vapour
Example of trace gas: CO₂
Example of trace gas: CO₂
Carbon dioxide
Example of trace gases: noble gases
Example of trace gases: noble gases
Noble gases, e.g., argon
Trace gases' role in climate
Trace gases' role in climate
Climate regulation
Trace gases' role in greenhouse effect
Trace gases' role in greenhouse effect
Maintaining the greenhouse effect
Trace gases' role in environmental reactions
Trace gases' role in environmental reactions
Support various chemical reactions