NextMockপরীক্ষা খুঁজুন, যেমন SSC CGL, UPPSC, Lekhpal
State PCS PYQPrelims 2023

BPSC – Combined Competitive Examination · প্রশ্ন 24

The theory that states 'pieces of the Earth's crust are in constant, slow motion driven by movement in the mantle' is called:

  1. the theory of continental drift
  2. the theory of Pangaea
  3. the theory of plate tectonics
  4. the theory of plate boundaries
উত্তর দেখান ও ব্যাখ্যা

উত্তর: (C) the theory of plate tectonics

ব্যাখ্যা

Plate tectonics (1960s) describes rigid plates moving over the asthenosphere, driven by mantle convection.

  • (A) ভুল

    Wrong: Wegener's theory lacked a mantle-driven mechanism.

  • (B) ভুল

    Wrong: Pangaea is a supercontinent, not a theory of motion.

  • (C) সঠিক

    Correct: plate tectonics explains lithospheric plates moving over the mantle.

  • (D) ভুল

    Wrong: not a recognised theory.