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8th Class Science Some Natural Phenomena Question Bank Some Natural Phenomena

  • question_answer
    Earthquakes at two places M and N were measured as 2 and 4. How is the magnitude and their destructive energy at M and N related?

    A)  Tremor at N is strong as that at place ?M?

    B)                         Tremor at N is four times stronger than that at place 'M?.

    C)                         Tremor at N is 100 times stronger than that at place 'M?.

    D)                         Tremor at N is 1000 times stronger than that at place ?M?.

    Correct Answer: C

    Solution :

    Richter scale is not a linear scale. It is a logarithmic scale. A difference in magnitude of 2' implies a multiplication factor of 100.


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