UPSC Geography Oceans and continents Question Bank Oceanography

  • question_answer                                                                                    Consider the following factors.
    1. Temperature between \[{{18}^{o}}C\] and \[{{20}^{o}}C\]
    2. Upwelling of cold water
    3. Salinity above \[{{40}^{o}}\] %o
    4. Turbidity
    5. Fresh water
    6. Submarine Plate forms
    Which of the above factors are not suitable for the growth of corals?

    A)  1, 2, 3 and 4                

    B)  3, 4, 5 and 6

    C)  2, 3, 4 and 5  

    D)  1,3, 5 and 6

    Correct Answer: C

    Solution :

     Corals grow well in areas where temperature varies between \[{{18}^{o}}C\] and \[{{30}^{o}}C\]. Upwelling of cold water in the tropical oceans leads to lowering of temperature below \[{{18}^{o}}C\] which is harmful for the corals. Salinity between 27% and 30% is suitable for corals and salinity below 27% and higher than 30% is harmful for the corals. Turbidity indicates the presents of suspended material which is harmful for the corals. Like sediment associated with turbidity, fresh water is also harmful for the corals,      

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