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6.2 Stratosphere Ozone
Test Description: ESS Topic 6.2 Ozone Depletion Stratosphere
Instructions: Answer all questions to get your test result.
1) Layer of gaseous ozone in the stratosphere that protects life on earth by filtering out most harmful ultraviolet radiation from the sun.
A
Ozone Layer
B
Greenhouse Gases
C
Stratosphere
D
Troposphere
2) The breakdown of stratospheric ozone...
A
... prevents UV rays from reaching the earth’s surface.
B
I and II
C
... can originate from the emission of chlorofluorocarbons (CFCs).
D
... is catalyzed through a free chlorine (Cl) atom.
3) Which agreement allowed for a reduction, and eventual elimination, of CFC production and use?
A
Paris Agreement
B
Kyoto Protocol
C
Montreal Protocol
D
Yo MaMa
4) How do CFCs affect ozone production?
A
UV radiation frees a fluorine atom, which breaks down ozone.
B
Infrared radiation frees a chlorine atom, which breaks down ozone.
C
UV radiation frees a chlorine atom, which breaks down ozone.
D
Infrared radiation frees a chlorine atom, which breaks down ozone.
5) Though CFC production has been curtailed, the threat to upper atmosphericozone continues because CFCs...
A
...persist and continue to destroy ozone for decades.
B
...become harmless quickly.
C
...destroy ozone for only a short time.
D
...persist but stop destroying ozone.
6) Which is NOT a result of the reduction in stratospheric ozone?
A
increased skin cancer
B
increased likelihood of cataracts
C
reduced photosynthetic activity
D
increased birth defects
7) Which is not an example of an ecological consequence of reduced stratospheric ozone?
A
loss of biodiversity from reduced photosynthesis in plants
B
increased crop yield
C
reduced terrestrial biome productivity
D
collapse of marine food webs
8) 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
False
B
True
9) Which statement regarding the decreased level of stratospheric ozone is correct?
A
Although the Montreal Protocol led to a reduction in the use of CFCs, it will have little effect on stratospheric ozone level
B
The largest decrease in the level of stratospheric ozone over the Arctic region occurs between January and April
C
There is no correlation between the incidence of cataracts and skin cancers and the lower level so stratospheric ozone
D
Increased photosynthetic activity has been measured in the phytoplankton around Antarctica
10) Why are the ozone holes (arctic and antarctic) over the poles? ...chose the ONE best answer...
A
global distillation effect
B
ODS use is greatest at the poles
C
global winds
D
stratospheric ice clouds
11) Location of the largest whole in the ozone.
A
Arctic
B
Antarctica
C
Deep Blue Horizons
D
Iceland
12) 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
13) Which options are true for Stratospheric ozone?
A
O3 naturally repels UV
B
Tropospheric O3 is a protectant and Stratospheric O3 is a pollutant
C
CFCs are not stable in the troposphere
D
CFCs are unstable in the stratosphere
14) Which in not a consequences of stratospheric ozone depletion?
A
skin cancer
B
phytoplankton population increase
C
cataracts
D
decreased crop yield
*select an answer for all questions
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