Composition and Structure of the Atmosphere (Grade 10 NSC Matric Geography): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
How many oxygen atoms are bonded together in an ozone molecule?
How many oxygen atoms are bonded together in an ozone molecule?
Three oxygen atoms
In which atmospheric layer is the ozone layer located?
In which atmospheric layer is the ozone layer located?
Stratosphere
What percentage of atmospheric ozone is found in the stratosphere?
What percentage of atmospheric ozone is found in the stratosphere?
90%
What happens when high-energy UV radiation hits an oxygen molecule (O₂)?
What happens when high-energy UV radiation hits an oxygen molecule (O₂)?
It splits into two oxygen atoms
What does the ozone layer convert harmful UV radiation into?
What does the ozone layer convert harmful UV radiation into?
Heat energy
Below what measurement is an area considered to have an 'ozone hole'?
Below what measurement is an area considered to have an 'ozone hole'?
Below 220 Dobson Units
What were CFCs commonly used in before they were found to damage the ozone layer?
What were CFCs commonly used in before they were found to damage the ozone layer?
Refrigeration and aerosol sprays
How many ozone molecules can one chlorine atom destroy?
How many ozone molecules can one chlorine atom destroy?
Thousands of ozone molecules
A 1% reduction in ozone causes what increase in UV radiation reaching Earth's surface?
A 1% reduction in ozone causes what increase in UV radiation reaching Earth's surface?
2% increase
When is the final phase-out of HCFC chemicals scheduled under the Montreal Protocol?
When is the final phase-out of HCFC chemicals scheduled under the Montreal Protocol?
2030