Question

prepare a quiz on biogeochemical cycles and depletion of Ozone layer

Answer 1

1. what is other name of biogeochemical cycles.
(a) inorganic -organic cycle
(b) quasi-static cycle
(c) Carnot engine cycle
(d) none of the above

2. biogeochemical is related to
(a) biotic
(b) abiotic
(c) all the above
(b) none of those.

3. the main elements in the cycles are
(a) carbon
(b) hydrogen
(c) oxygen
(d) all of the above.

4. which element is most abundant in atmosphere ?
(a) oxygen
(b) nitrogen
(c) carbon
(d) none of these.

5. Which one of the following fixes CO2 into carbohydrates?
(a) Rhizobium
(b) Nitrobacter
(c) Bacillus
(d) Rhodospirillum

6. During which phase of the nitrogen cycle do decomposers break down nitrates into ammonium?
(a) Ammonification
(b) Nitrification
(c) Denitrification
(d) Assimilation

7. Which of the following organisms plays a major role in all phases of the nitrogen cycle?
(a) Bacteria
(b) Fungi
(c) Plants
(d) Animals

8. Which phase of the water cycle occurs through the stomata of plant leaves?
(a)Precipitation
(b) Evaporation
(c) Condensation
(d) Transpiration

9. Which of the following events occurs immediately prior to rain or snow fall?
(a) Evaporation
(b) Condenstation
(c) Infiltration
(d) Transpiration

10. Which element does not cycle through the atmosphere in the form of a gas?
(a) carbon
(b) nitrogen
(c) oxygen
(d) phosphorus

11. what is the full form of CFC.
(a) chlorofluorocarbon
(b) chlorofluorocarbonate.
(c) carbonfluorocarbon.
(d) none of these

12. the main cause of ozone depletion :
(a) CFC's
(b) halocarbons refrigerant
(c) HCFC's
(d) all of the above .

13. chemical equation of ozone layer
(a) O2
(b) O3
(c) [O]
(d) NO2

14. why ozone layer is so important ?
(a) it protects us from UV's rays .
(b) it is good for earth.
(c) it protects the earth from UFO.
(d) none of these.

16. ozone hole is seen
(a) Antarctica
(b) Asia
(c) Europe
(d) none of these.

ans :- 1. (a) 2. (c) 3.(d) 4.(b) 5.(d) 6.(a) 7.(a) 8.(d) 9.(b) 10.(d) 11.(a) 12.(d) 13.(b) 14.(a) 15.(a)

Answer 2

1) During which phase of the nitrogen cycle do decomposes break down nitrates into ammonium?

2) During which phase of the nitrogen cycle do bacteria and lightning strikes convert  atmospheric nitrogen into a usable form?

3) Which of the following events occurs immediately prior to rain or snow fall?

4) Which nutrient does not cycle through the atmosphere in the form of a gas?

5) Which of the following causes harmful algal blooms that result in dead zones in the ocean?

Runoff of nitrogen and phosphorus-rich fertilizers Burning of fossil fuels Increased amounts of acidic precipitation Increased levels of greenhouse gases