Question

What causes the subduction zone when an oceanic plate collides with a continental plate? Continental plates are more dense than oceanic plates so the continental plate dives under the oceanic plate Oceanic plates are more dense than continental plates so the oceanic plate dives under the continental plate Continental plates are more dense than oceanic plates causing the oceanic plate to push upward When the continental plates collide the force is so great that it causes the surrounding crust to collapse

Answer 1

Oceanic plates are more dense than continental plates so the oceanic plate dives under the continental plate.

This creates subduction zones, in which volcanoes are formed  

Answer 2

Answer:

Option (2)

Explanation:

The oceanic plates are denser compared to the continental plate because they are comprised of relatively denser minerals. When these two plates namely the continental and the oceanic plate collides, forms a subduction zone, where the denser oceanic crust goes below the lighter continental plate. This results in the partial melting of the subducting oceanic crust, that mixes up with the melt and eventually rises up again due to the force exerted by the convection current. It thereby results in the formation of the volcanoes on the over-riding plate.

Thus, the correct answer is option (2).