SSC Geography Sample Paper NCERT Sample Paper-6

  • question_answer
    Assumption: Tsunami is small in Open Ocean yet may be over 30 m high when it reaches a coastline. Reason: Tsunamis have long wavelength and they travel across the open ocean at high speed. As they approach shore, the wavelength decreases and the wave height increases. Codes:

    A)  Both A and R are true and R is the correct explanation of A

    B)  Both A and R are true. But R is not the correct explanation of A

    C)  A is true, but R is false

    D)  A is false, but R is true

    Correct Answer: A

    Solution :

    [a] Tsunamis can have wavelengths ranging from 10 to 500 km and wave periods of up to an hour. As a result of their long wavelengths, tsunamis act as shallow-water waves. A wave becomes a shallow-water wave when the wavelength is very large compared to the water depth.

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