Formation of Earth's Atmosphere (AQA GCSE Chemistry Combined Science): Flashcards
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How long has modern atmosphere existed in current form?
How long has modern atmosphere existed in current form?
Approx. 200 million years
Nitrogen () % in atmosphere
Nitrogen () % in atmosphere
Almost 80%
Oxygen () % in atmosphere
Oxygen () % in atmosphere
About 20%
Most abundant atmospheric gas
Most abundant atmospheric gas
Nitrogen ()
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 < 1% proportion
Examples of trace gases
Examples of trace gases
, , noble gases (e.g., argon)
Trace gases role in climate
Trace gases role in climate
Climate regulation
Trace gases and greenhouse effect
Trace gases and greenhouse effect
Maintain the greenhouse effect
Stability of gas proportions in atmosphere
Stability of gas proportions in atmosphere
Relatively stable for ~200 million years
Trace gases role in chemical reactions
Trace gases role in chemical reactions
Support chemical reactions in environment