UPSC Geography The origin and evolution of the earth Question Bank Universe / Sun / Planets / Earth

  • question_answer Scientists have determined the temperature near the Earth's centre 1,000°C hotter than was reported in an experiment am 20 years ago. The actual temperature is?

    A)  \[6,{{000}^{o}}\]Celsius         

    B)  \[5,{{000}^{o}}\]Celsius         

    C)  \[4,{{000}^{o}}\]Celsius         

    D)  None of these

    Correct Answer: A

    Solution :

     These measurements confirm geophysical models that say that the temperature difference between the solid core and the mantle above must be at least \[1,{{500}^{o}}C\] to explain why the earth has a magnetic field. The research team, which was led by Agnes Dewaele from the CEA, a French technological research organisation, used X-rays from the European Synchrotron Radiation Facility (ESRF) in Grenoble, France, as a key investigating tool.

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