PIMSO 2025 - Science - Secondary 3 - National Round Question 21

Question 21

Why does the oceanic crust sink beneath the continental crust at the subduction zone?

1. The oceanic crust has a greater density.
2. The oceanic crust is pulled downward by the Earth’s magnetic field.
3. The oceanic crust is push from the ridge.
4. The continental crust has denser composition.