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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
Stratosphere
B
Ozone Layer
C
Troposphere
D
Greenhouse Gases
2) The breakdown of stratospheric ozone...
A
... is catalyzed through a free chlorine (Cl) atom.
B
I and II
C
... can originate from the emission of chlorofluorocarbons (CFCs).
D
... prevents UV rays from reaching the earth’s surface.
3) Which agreement allowed for a reduction, and eventual elimination, of CFC production and use?
A
Yo MaMa
B
Montreal Protocol
C
Kyoto Protocol
D
Paris Agreement
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
Infrared radiation frees a chlorine atom, which breaks down ozone.
D
UV 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 but stop destroying ozone.
B
...become harmless quickly.
C
...destroy ozone for only a short time.
D
...persist and continue to destroy ozone for decades.
6) Which is NOT a result of the reduction in stratospheric ozone?
A
reduced photosynthetic activity
B
increased likelihood of cataracts
C
increased birth defects
D
increased skin cancer
7) Which is not an example of an ecological consequence of reduced stratospheric ozone?
A
collapse of marine food webs
B
loss of biodiversity from reduced photosynthesis in plants
C
increased crop yield
D
reduced terrestrial biome productivity
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
Increased photosynthetic activity has been measured in the phytoplankton around Antarctica
B
The largest decrease in the level of stratospheric ozone over the Arctic region occurs between January and April
C
Although the Montreal Protocol led to a reduction in the use of CFCs, it will have little effect on stratospheric ozone level
D
There is no correlation between the incidence of cataracts and skin cancers and the lower level so stratospheric ozone
10) Why are the ozone holes (arctic and antarctic) over the poles? ...chose the ONE best answer...
A
stratospheric ice clouds
B
ODS use is greatest at the poles
C
global winds
D
global distillation effect
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
UV radiation breaks up ozone by splitting off an oxygen atom.
C
All of the above
D
It forms when a free oxygen atom reacts with a molecule of oxygen.
13) Which options are true for Stratospheric ozone?
A
CFCs are not stable in the troposphere
B
Tropospheric O3 is a protectant and Stratospheric O3 is a pollutant
C
CFCs are unstable in the stratosphere
D
O3 naturally repels UV
14) Which in not a consequences of stratospheric ozone depletion?
A
decreased crop yield
B
phytoplankton population increase
C
skin cancer
D
cataracts
*select an answer for all questions
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