Question

Order the steps of volcanic island arc formation. (4 items) (Drag and drop into the appropriate area) An accretionary prism begins to form. Lava erupts onto the surface, forming volcanoes. Magma, created by flux melting of the mantle, rises through the overriding plate. A subduction trench forms where the subducting plate bends downward into the mantle. Convergence begins 1 2 3 4 A volcanic island arc forms.

Answer 1

The correct order of steps for volcanic island arc formation is: convergence begins, a subduction trench forms, magma rises through the overriding plate, an accretionary prism forms, and finally, a volcanic island arc forms.

Step-by-step explanation:

The correct order of steps for volcanic island arc formation is as follows:

1. Convergence begins
2. A subduction trench forms where the subducting plate bends downward into the mantle
3. Magma, created by flux melting of the mantle, rises through the overriding plate
4. The accretionary prism begins to form

After these steps, a volcanic island arc forms.

Answer 2

The formation of a volcanic island arc starts with convergence at a subduction zone, forming a trench, followed by an accretionary prism. Magma then rises due to flux melting and eventually erupts, creating a volcanic island arc.

Step-by-step explanation:

The formation of a volcanic island arc involves several key steps related to subduction zones where two tectonic plates interact. Initially, convergence begins and as the oceanic plate collides with a continental or another oceanic plate, it starts to subduct beneath the overriding plate. This process results in a subduction trench forming due to the bending of the subducting plate down into the mantle.

As the plate continues to subduct, hydrated minerals within it release water, reducing the melting temperature of the mantle above the plate, leading to flux melting and the creation of magma. This magma rises through the overriding plate, breaking through to form volcanoes on the surface. Alongside these events, an accretionary prism forms from the sediments scraped off the subducting plate, which accumulate on the overriding plate near the trench. Finally, these volcanic activities result in the establishment of a volcanic island arc.

1. 
   
3. Convergence begins and a subduction trench forms where the subducting plate bends downward into the mantle.
4. 
   
6. An accretionary prism begins to form from the accumulation of sediments.
7. 
   
9. Magma, created by flux melting of the mantle, rises through the overriding plate.
10. 
    
12. Lava erupts onto the surface, forming volcanoes and leading to the formation of a volcanic island arc.