Formation of Earth's Atmosphere (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards
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How long has the modern atmosphere existed in its current form?
How long has the modern atmosphere existed in its current form?
Approximately 200 million years
Percentage of nitrogen in atmosphere
Percentage of nitrogen in atmosphere
Almost 80%
Most abundant gas in atmosphere
Most abundant gas in atmosphere
Nitrogen ()
Percentage of oxygen in atmosphere
Percentage of oxygen in atmosphere
About 20%
Role of oxygen in living organisms
Role of oxygen in living organisms
Crucial for respiration
Definition of trace gases
Definition of trace gases
Gases present in proportions of less than 1%
Example of a trace gas (water)
Example of a trace gas (water)
Water vapour ()
Example of a trace gas (carbon)
Example of a trace gas (carbon)
Carbon dioxide ()
Example of trace gases (inert)
Example of trace gases (inert)
Noble gases (e.g., argon)
Role of trace gases in climate
Role of trace gases in climate
Climate regulation
Trace gases' role in Earth's temperature
Trace gases' role in Earth's temperature
Maintaining the greenhouse effect
Stability of atmospheric gas proportions
Stability of atmospheric gas proportions
Remained relatively stable for 200 million years