BPSC – Combined Competitive Examination · প্রশ্ন 23
The process that continually adds new crust is:
উত্তর দেখান ও ব্যাখ্যা
উত্তর: (C) seafloor spreading
ব্যাখ্যা
At divergent mid-ocean ridges, seafloor spreading continuously creates new crust (Harry Hess).
- (A) ভুল
Wrong: subduction destroys crust.
- (B) ভুল
Wrong: earthquakes do not create crust.
- (C) সঠিক
Correct: magma rising at mid-ocean ridges forms new oceanic crust.
- (D) ভুল
Wrong: convection drives plates but does not itself add crust.