Destructive (C + O)

Question 1

1. (direction + why)

Answer 1

• Two plates move towards each other
• due to convection currents

Question 2

2 (process)

Answer 2

• Subduction occurs
• more dense oceanic plate moves below the continental plate

Question 3

3 (movement)

Answer 3

• Oceanic plate move into upper asthenosphere
• flux melting occurs (melted as enters asthenosphere)

Question 4

4 (what does it form+ why?)

Answer 4

• At point of subduction, deep ocean trench formed
• due to crust dragged down with subducting plate.

Question 5

5 (BZ)

Answer 5

• Benioff zone is where flux melting occurs,
• magma forms = pressure build-up
• rises through weak areas in cont. plate to form (composite) volcanoes

Question 6

6 (sediment)

Answer 6

• Sediment on crust may also be folded, faulted and thrust upwards
• forms fold mountains