Identify the plates involved in Diagram A, describe the plate movements in A and B, classify boundaries A and B, explain the processes occurring at each boundary, differentiate between folding and fau

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4.5.1) The two crustal plates colliding in Diagram A are the Indo-Australian plate and the Eurasian plate.

4.5.2) In Diagram A, convergence occurs (plates move towards each other). In Diagram B, divergence occurs (plates move away from each other).

4.5.3) Plate boundary A is a destructive boundary. Plate boundary B is a constructive boundary.

4.5.4)

• At boundary A (convergent), plates collide, and one plate is often forced beneath the other (subduction), leading to the destruction or recycling of crustal material.
• At boundary B (divergent), plates move apart, allowing magma to rise from the mantle and solidify, forming new crustal material.

4.5.5)

• Folding is the bending of rock layers due to compressional forces, typically without breaking.
• Faulting is the fracturing or breaking of rock layers, with displacement of the rocks on either side of the break.

4.5.6) Faulting will take place at both plate boundaries A and B.

4.5.7)

• At boundary A (convergent), the immense compressional forces cause rocks to break and slide past each other, forming reverse or thrust faults.
• At boundary B (divergent), tensional forces pull the crust apart, causing it to stretch and fracture, resulting in normal faults and the formation of a rift valley.