The Atmosphere and Climate Change (Grade 11 NSC Matric Life Sciences): Flashcards
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% of N₂, O₂, & trace gases in atmosphere
% of N₂, O₂, & trace gases in atmosphere
78% nitrogen, 21% oxygen, 1% trace gases
Climate definition
Climate definition
Average weather of large area over long period
Carbon sink definition
Carbon sink definition
Natural system that absorbs and stores CO₂
Earth's temp without greenhouse gases
Earth's temp without greenhouse gases
-18°C
Most significant GHG from human activities
Most significant GHG from human activities
Carbon dioxide (CO₂)
Methane heat-trapping potency vs CO₂
Methane heat-trapping potency vs CO₂
25 times more potent
% of UV radiation absorbed by ozone layer
% of UV radiation absorbed by ozone layer
97-99%
Deforestation's % of global GHG emissions
Deforestation's % of global GHG emissions
20%
The 9 Rs for reducing carbon footprint
The 9 Rs for reducing carbon footprint
Refuse,Reduce,Reuse,Recover,Recycle,Repair,Replant,Renew,Rethink
Montreal Protocol: year & purpose
Montreal Protocol: year & purpose
1987 treaty to reduce ozone-destroying substances