6.2 Stratosphere Ozone Question Preview (ID: 56936)
ESS Topic 6.2
Ozone Depletion Stratosphere.
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Layer of gaseous ozone in the stratosphere that protects life on earth by filtering out most harmful ultraviolet radiation from the sun.
a) Greenhouse Gases
b) Stratosphere
c) Troposphere
d) Ozone Layer
The breakdown of stratospheric ozone...
a) ... can originate from the emission of chlorofluorocarbons (CFCs).
b) ... is catalyzed through a free chlorine (Cl) atom.
c) ... prevents UV rays from reaching the earth’s surface.
d) I and II
Which agreement allowed for a reduction, and eventual elimination, of CFC production and use?
a) Montreal Protocol
b) Paris Agreement
c) Kyoto Protocol
d) Yo MaMa
How do CFCs affect ozone production?
a) UV radiation frees a fluorine atom, which breaks down ozone.
b) UV radiation frees a chlorine atom, which breaks down ozone.
c) Infrared radiation frees a chlorine atom, which breaks down ozone.
d) Infrared radiation frees a chlorine atom, which breaks down ozone.
Though CFC production has been curtailed, the threat to upper atmosphericozone continues because CFCs...
a) ...become harmless quickly.
b) ...persist but stop destroying ozone.
c) ...persist and continue to destroy ozone for decades.
d) ...destroy ozone for only a short time.
Which is NOT a result of the reduction in stratospheric ozone?
a) increased likelihood of cataracts
b) increased skin cancer
c) reduced photosynthetic activity
d) increased birth defects
Which is not an example of an ecological consequence of reduced stratospheric ozone?
a) increased crop yield
b) loss of biodiversity from reduced photosynthesis in plants
c) collapse of marine food webs
d) reduced terrestrial biome productivity
UV rays can cause obvious short term damage, such as sunburn, as well as long term damage that accumulates with each exposure to the sun.
a) True
b) False
c)
d)
Which statement regarding the decreased level of stratospheric ozone is correct?
a) Increased photosynthetic activity has been measured in the phytoplankton around Antarctica
b) Although the Montreal Protocol led to a reduction in the use of CFCs, it will have little effect on stratospheric ozone level
c) The largest decrease in the level of stratospheric ozone over the Arctic region occurs between January and April
d) There is no correlation between the incidence of cataracts and skin cancers and the lower level so stratospheric ozone
Why are the ozone holes (arctic and antarctic) over the poles? ...chose the ONE best answer...
a) stratospheric ice clouds
b) global distillation effect
c) global winds
d) ODS use is greatest at the poles
Location of the largest whole in the ozone.
a) Antarctica
b) Arctic
c) Iceland
d) Deep Blue Horizons
Which is true about ozone formation and destruction? select all that apply
a) Its formation and destruction is an example of a dynamic process in nature.
b) It forms when a free oxygen atom reacts with a molecule of oxygen.
c) UV radiation breaks up ozone by splitting off an oxygen atom.
d) All of the above
Which options are true for Stratospheric ozone?
a) CFCs are not stable in the troposphere
b) CFCs are unstable in the stratosphere
c) Tropospheric O3 is a protectant and Stratospheric O3 is a pollutant
d) O3 naturally repels UV
Which in not a consequences of stratospheric ozone depletion?
a) cataracts
b) phytoplankton population increase
c) skin cancer
d) decreased crop yield
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