Question

Select the correct answer from each drop-down menu. Complete the passage about the process of subduction. The subduction of boundary often forms volcanoes. This phenomenon occurs because the underground pressure squeezes water out of the dense crust, and this water works its way into the mantle. The water _______ the mantle and allows for the creation of magma.

1) evaporates
2) condenses
3) solidifies
4) permeates

Answer 1

The water from the subducted plate permeates the overlying mantle, lowering its melting temperature and forming magma, which can lead to volcanic activity above the subduction zone.

Step-by-step explanation:

During the process of subduction, one tectonic plate slides beneath another into the mantle. This process not only creates deep ocean trenches but also results in intense heat and pressure conditions.

As the subducting plate descends, water stored in hydrated minerals is released. This water permeates the overlying mantle and lowers its melting temperature, hence, the water permeates the mantle and facilitates the creation of magma.

Following this passage of water into the mantle, volcanic activity can occur above the subduction zone, marked by the emergence of volcanoes along convergent plate boundaries.