Question

plates and volcanoes quick check
which processes are important in the formation of volcanic arcs at the edge of continental plates? select the two correct answers. (1 point)
plate divergence
passing over a hotspot
uplift
subduction

Explanation:

To determine the processes forming volcanic arcs at continental plate edges:

• Subduction: When an oceanic plate subducts (dives) under a continental plate, the subducted plate melts, forming magma that rises to create volcanic arcs.
• Uplift: As the subducting plate causes pressure and melting, the overlying continental crust can uplift, contributing to volcanic arc formation.
• Plate divergence (spreading apart) forms mid - ocean ridges, not volcanic arcs at continental edges.
• Passing over a hotspot creates island chains (e.g., Hawaii), not volcanic arcs at continental margins.

Answer:

C. uplift, D. subduction