Question

6. Crust is created and formed as a result of plate movement.

A. Where does crust form? (2 points)
B. How does the crust form? (2 points)
C. Where is crust destroyed? (2 points)
D. How is the crust destroyed? (2 points)

Answer 1

A. Crust is formed at divergent plate boundaries and at some hotspots.

B. At divergent plate boundaries, magma rises up from the mantle to fill the gap created by the plates moving apart. This magma cools and solidifies to form new crust. At hotspots, plumes of hot material rise up from the mantle, melting the crust and creating new magma, which then solidifies to form new crust.

C. Crust is destroyed at subduction zones.

D. At subduction zones, one plate is forced beneath another plate into the mantle. As the plate descends into the mantle, it heats up and begins to melt, creating magma. Some of this magma may rise up and solidify to form new crust, but much of it stays within the mantle. The melting of the subducted plate can also cause volcanic activity at the surface.

Step-by-step explanation: