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How well do you know
the Atmosphere?
1. Which gas has a normal
atmospheric concentration
of 0.038%? (1)
2. Give two processes that
may cause the composition
of the atmosphere to
fluctuate (1)
3. How does the temperature
change with altitude in the
stratosphere? Why? (2)
4. List 3 consequences of
a reduced ozone layer.
(1)
5. List the major
anthropogenic sources of
Carbon dioxide, Methane and
CFCs (3)
6. Why will sea levels rise due
to global warming? (2)
7. What are the possible
ecological impacts of global
climate change? (2)
8. What am I describing when I say:
“when the output of a system acts to oppose changes to the input
of the system; with the result that the system returns to normal”
(1)
9. What is the name of the treaty
that MEDCs signed to reduce
their emissions of 6 greenhouse
gases by 2012? (1)
10. Give 2 methods to reduce
the amount of CFCs in the
atmosphere (1)
11. Which type of UV radiation is
blocked by the ozone layer? (1)
12. Write the equation to show
the first step in ozone
destruction by CFCs. (1)
ANSWERS!!
1. Which gas has a normal
atmospheric concentration
of 0.038%? (1)
•
Carbon Dioxide
2. Give two processes that
may cause the composition
of the atmosphere to
fluctuate (1)
•
Photosynthesis, respiration,
evapotranspiration
3. How does the temperature
change with altitude in the
stratosphere? Why? (2)
•
• Increases with altitude
The ozone layer captures UV from the
sun and heats the stratosphere.
4. List 3 consequences of
a reduced ozone layer.
(1)
•
•
Skin cancer
• Cataracts
• DNA damage
Plant tissue damage
• Mutations
5. List the major
anthropogenic sources of
Carbon dioxide, Methane and
CFCs (3)
•
•
•
Carbon dioxide: Combustion of fossil fuels,
deforestation
Methane: Livestock, padi fields, landfill sites,
anaerobic respiration, leaks from gas fields
CFCs: Aerosol propellants, fire extinguishers,
refrigerants, solvents, expanded foam plastics
6. Why will sea levels rise due
to global warming? (2)
•
•
Increased temperatures cause ice caps
to melt
Increased temperatures cause water to
expand and take up more space per
molecule.
7. What are the possible
ecological impacts of global
climate change? (2)
• Plant growth rates will increase
• Precipitation changes cause wetlands to
grow or shrink
• Hibernation will be disturbed by warmer
winters
• Timing of ecological events (nesting,
flowering etc) may change
8. What am I describing when I say:
“when the output of a system acts to oppose changes to the input
of the system; with the result that the system returns to normal”
(1)
•
Negative feedback
9. What is the name of the treaty
that MEDCs signed to reduce
their emissions of 6 greenhouse
gases by 2012? (1)
•
Kyoto Protocol
10. Give 2 methods to reduce
the amount of CFCs in the
atmosphere (1)
•
2 from: use alternative methods;
hydrocarbons in aerosols; HFCs or
HCFCs in refrigerators; pump
action sprays
11. Which type of UV radiation is
blocked by the ozone layer? (1)
•
UVB
12. Write the equation to show
the first step in ozone
destruction by CFCs. (1)
•
Cl + O3  ClO + O2