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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
Greenhouse Gases
B
Ozone Layer
C
Stratosphere
D
Troposphere
2) The breakdown of stratospheric ozone...
A
... is catalyzed through a free chlorine (Cl) atom.
B
... prevents UV rays from reaching the earth’s surface.
C
I and II
D
... can originate from the emission of chlorofluorocarbons (CFCs).
3) Which agreement allowed for a reduction, and eventual elimination, of CFC production and use?
A
Montreal Protocol
B
Kyoto Protocol
C
Yo MaMa
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
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
...persist but stop destroying ozone.
D
...destroy ozone for only a short time.
6) Which is NOT a result of the reduction in stratospheric ozone?
A
increased skin cancer
B
reduced photosynthetic activity
C
increased likelihood of cataracts
D
increased birth defects
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
reduced terrestrial biome productivity
D
increased crop yield
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
There is no correlation between the incidence of cataracts and skin cancers and the lower level so stratospheric ozone
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
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
ODS use is greatest at the poles
B
global winds
C
stratospheric ice clouds
D
global distillation effect
11) Location of the largest whole in the ozone.
A
Arctic
B
Deep Blue Horizons
C
Iceland
D
Antarctica
12) Which is true about ozone formation and destruction? select all that apply
A
All of the above
B
UV radiation breaks up ozone by splitting off an oxygen atom.
C
Its formation and destruction is an example of a dynamic process in nature.
D
It forms when a free oxygen atom reacts with a molecule of oxygen.
13) Which options are true for Stratospheric ozone?
A
Tropospheric O3 is a protectant and Stratospheric O3 is a pollutant
B
O3 naturally repels UV
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
decreased crop yield
B
phytoplankton population increase
C
cataracts
D
skin cancer
*select an answer for all questions
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