The Ozone Layer (Grade 10 NSC Matric Geography): Flashcards
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No. of oxygen atoms in an ozone molecule
No. of oxygen atoms in an ozone molecule
Three (O₃)
Atmospheric layer containing the ozone layer
Atmospheric layer containing the ozone layer
Stratosphere (15-55 km altitude)
% of atmospheric ozone in stratosphere
% of atmospheric ozone in stratosphere
90%
Chemical equation for ozone formation
Chemical equation for ozone formation
O + O₂ = O₃
Main function of the ozone layer
Main function of the ozone layer
Absorbs harmful UV radiation from the sun
Unit for measuring ozone concentration
Unit for measuring ozone concentration
Dobson Units
Ozone level threshold defining an 'ozone hole'
Ozone level threshold defining an 'ozone hole'
Below 220 Dobson Units
What CFC stands for
What CFC stands for
Chlorofluorocarbons
No. of ozone molecules 1 chlorine atom can destroy
No. of ozone molecules 1 chlorine atom can destroy
Thousands
UV increase from 1% ozone reduction
UV increase from 1% ozone reduction
2% increase in UV radiation