,1. Whichnnisnnnotnnanngreenhousenngas?
A) waternnvapor
B) oxygen
C) methane
D) ozone
2. Whichnnmoleculenndoesnnnotnnoccurnnnaturally?
A) ozone
B) methane
C) carbonnndioxide
D) CFCsnnandnnHFCs
3. Whichnnisnnannnaturalnnsourcennofnncarbonnndioxide?
A) photosynthesis
B) volcanicnnactivity
C) fossilnnfuelnncombustion
D) ultravioletnnradiation
4. Whichnnisnnannnanthropogenicnnsourcennofnncarbonnndioxide?
A) photosynthesis
B) volcanoes
C) fossilnnfuels
D) anaerobicnnbacteria
5. Whichnnisnnannsinknnfornncarbonnndioxide?
A) photosynthesis
B) ultravioletnnradiation
C) soilnnbacteria
D) volcanoes
6. Whichnnisnnannnaturalnnmethanennsource?
A) photosynthesis
B) volcanoes
C) fossilnnfuels
D) anaerobicnnbacteria
Pagenn1
, 7. Whichnnisnnannmethanennsink?
A) photosynthesis
B) ultravioletnnradiation
C) thennoceans
D) rainfall
8. Whichnnisnnannwater-vapornnsource?
A) evaporation
B) condensation
C) ultravioletnnradiation
D) rainfall
9. Whichnnisnnannwater-vapornnsink?
A) evaporation
B) condensation
C) ultravioletnnradiation
D) fossilnnfuels
10. Whichnnisnnannnozonennsource?
A) photosynthesis
B) evaporation
C) ultravioletnnradiation
D) aerosols
11. Whichnnisnnannnozonennsink?
A) photosynthesis
B) condensation
C) ultravioletnnradiation
D) fossilnnfuels
12. Whichnnisnnannnitrousnnoxidennsource?
A) photosynthesis
B) condensation
C) ultravioletnnradiation
D) soilnnbacteria
Pagenn2
, 13. Whichnnisnnannnitrousnnoxidennsink?
A) photosynthesis
B) condensation
C) ultravioletnnradiation
D) soilnnbacteria
14. WhichnnisnnannCFCnnsource?
A) humannnactivity
B) condensation
C) ultravioletnnradiation
D) soilnnbacteria
15. WhichnnisnnannCFCnnsink?
A) photosynthesis
B) condensation
C) ultravioletnnradiation
D) soilnnbacteria
16. Cloudsnnarenncomposednnof .
A) waternnvapor
B) aerosols
C) nitrogen
D) CFCs
17. Ninety-ninennpercentnnofnnthennatmospherennisnnfoundnnbelow kilometers.
A) 32
B) 100
C) 170
D) 200
18. Atnnseannlevelnntherennis/arenn_
kilogram(s)nnpernnsquarenncentimeternnofnnairnnpress
urenonnnaverage.
A) 1
B) 2
C) 3
D) 4
Pagenn3
A) waternnvapor
B) oxygen
C) methane
D) ozone
2. Whichnnmoleculenndoesnnnotnnoccurnnnaturally?
A) ozone
B) methane
C) carbonnndioxide
D) CFCsnnandnnHFCs
3. Whichnnisnnannnaturalnnsourcennofnncarbonnndioxide?
A) photosynthesis
B) volcanicnnactivity
C) fossilnnfuelnncombustion
D) ultravioletnnradiation
4. Whichnnisnnannnanthropogenicnnsourcennofnncarbonnndioxide?
A) photosynthesis
B) volcanoes
C) fossilnnfuels
D) anaerobicnnbacteria
5. Whichnnisnnannsinknnfornncarbonnndioxide?
A) photosynthesis
B) ultravioletnnradiation
C) soilnnbacteria
D) volcanoes
6. Whichnnisnnannnaturalnnmethanennsource?
A) photosynthesis
B) volcanoes
C) fossilnnfuels
D) anaerobicnnbacteria
Pagenn1
, 7. Whichnnisnnannmethanennsink?
A) photosynthesis
B) ultravioletnnradiation
C) thennoceans
D) rainfall
8. Whichnnisnnannwater-vapornnsource?
A) evaporation
B) condensation
C) ultravioletnnradiation
D) rainfall
9. Whichnnisnnannwater-vapornnsink?
A) evaporation
B) condensation
C) ultravioletnnradiation
D) fossilnnfuels
10. Whichnnisnnannnozonennsource?
A) photosynthesis
B) evaporation
C) ultravioletnnradiation
D) aerosols
11. Whichnnisnnannnozonennsink?
A) photosynthesis
B) condensation
C) ultravioletnnradiation
D) fossilnnfuels
12. Whichnnisnnannnitrousnnoxidennsource?
A) photosynthesis
B) condensation
C) ultravioletnnradiation
D) soilnnbacteria
Pagenn2
, 13. Whichnnisnnannnitrousnnoxidennsink?
A) photosynthesis
B) condensation
C) ultravioletnnradiation
D) soilnnbacteria
14. WhichnnisnnannCFCnnsource?
A) humannnactivity
B) condensation
C) ultravioletnnradiation
D) soilnnbacteria
15. WhichnnisnnannCFCnnsink?
A) photosynthesis
B) condensation
C) ultravioletnnradiation
D) soilnnbacteria
16. Cloudsnnarenncomposednnof .
A) waternnvapor
B) aerosols
C) nitrogen
D) CFCs
17. Ninety-ninennpercentnnofnnthennatmospherennisnnfoundnnbelow kilometers.
A) 32
B) 100
C) 170
D) 200
18. Atnnseannlevelnntherennis/arenn_
kilogram(s)nnpernnsquarenncentimeternnofnnairnnpress
urenonnnaverage.
A) 1
B) 2
C) 3
D) 4
Pagenn3
