BPSC – Combined Competitive Examination · வினா 23
The process that continually adds new crust is:
விடையைக் காட்டு & விளக்கம்
விடை: (C) seafloor spreading
விளக்கம்
At divergent mid-ocean ridges, seafloor spreading continuously creates new crust (Harry Hess).
- (A) தவறு
Wrong: subduction destroys crust.
- (B) தவறு
Wrong: earthquakes do not create crust.
- (C) சரி
Correct: magma rising at mid-ocean ridges forms new oceanic crust.
- (D) தவறு
Wrong: convection drives plates but does not itself add crust.