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2. Ozone to spec

A Level Environmental Science revision
Quiz by
stwvlker
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Last updated: May 17, 2025
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First submittedMay 15, 2025
Times taken7
Average score100.0%
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Hint
Answer
Ozone layer
12-24km
Effects of UVB: Energy is _______ to _______ _____ as it breaks up _______ _______
Converted, chemical energy, biological molecules
Effects of UVB
Skin cancer
Effects of UVB
Cataracts
Effects of UVB
Leaf damage
Effects of UVB
Kills cyanobacteria
Benefits of cyanobacteria (9 words)
Waterlogged plants rely on cyanobacteria as a nitrogen source
Formation of ozone (10 words)
UV splits diatomic into monatomic, which reacts with another diatomic
Destruction of ozone (10 words)
UV splits ozone into monatomic oxygen and stable diatomic oxygen
CFCs features (10 words)
Non-natural compounds leached into the atmosphere through anthropogenic means
Chlorine and oxygen reactions
Cl + O3 -> ClO + O2
Chlorine and oxygen reactions
ClO + O3 -> Cl + 2O2
Hypothesis suggesting CFCs deplete Ozone + year
Rowland Molina 1974
Protocol reducing CFC usage + year
Montreal Protocol 1987
CFC properties
Persistant
CFC properties
UV dissociation
CFC properties
Chlorine reactions
Antarctic conditions
Low temperatures
Antarctic conditions
Polar stratospheric clouds
Antarctic conditions
Polar vortex winds
Polar stratospheric cloud temperature
-78
Polar stratospheric cloud composition
Ice crystals and NOx or SOx
Polar stratospheric clouds provide... (8 words)
Catalytic surface for chemical reactions to create Cl2
Hint
Answer
Greatest Antarcic depletion
October
Greatest Antarcic depletion reasons
Seasonal variation
Greatest Antarcic depletion reasons
Light availability
Ozone measurement
Dobson Units
Normal ozone
300 DU
Ozone hole threshold
220 DU
First evidence of ozone depletion
Ground level UV
Location of first evidence + company
Halley Bay, British Antarctic Survey
% less than expected levels +year
40%, 1984
Lowest recorded concentration +year
73, 1994
Antarctic 2015 spike reason
Calbuco volcano, Chile
2016 shrinkage
4x10^6
Measuring ozone
Satellite surveys
Measuring ozone
Stratospheric air samples
How satellites measure depletion
Reflected UV
How air samples are collected
Helium balloons
How air samples are collected
Research aircraft
How air samples provided evidence
Chemical presence
Chemicals in air samples
Chlorine
Chemicals in air samples
Chlorine monoxide
Spatial variability - greatest
Antarctica
Temporal variability - greatest
Spring
Altitudal variability - greatest
Ozone layer
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