2.2 Physical processes at plate margins

Question 1

What is a constructive plate margin?

Answer 1

➢ Where two plates are moving apart from one another

Question 2

What is a destructive plate margin?

Answer 2

➢ Where two plates are moving towards on another

Question 3

What is a conservative plate margin?

Answer 3

➢ Where two plates are sliding alongside each other

Question 4

What happens at a constructive plate margin?

Answer 4

➢ Two plates are moving apart

➢ Which causes magma to force its way to the surface

Question 5

What type of volcanoes form at a constructive plate margin and why?

Answer 5

➢ Shield volcanoes which are broad and flat

➢ This is because the magma at a constructive plate margin is very hot and fluid

Question 6

What happens at a destructive plate margin?

Answer 6

➢ A continental and ocean plate are moving towards one another

Question 7

Explain what happens to the oceanic crust in a destructive plate margin

Answer 7

➢ It is subducted underneath the continental plate
➢ The oceanic plate melts as it moves downwards
➢ Creates magma which is less fluid at a constructive plate margin
➢ So steep-sided composite volcanoes are formed

Question 8

What happens at a destructive plate margin where there are 2 continental plates?

Answer 8

➢ The plates collides and the land buckles upwards to from mountains

Question 9

What happens at a conservative plate margin?

Answer 9

➢ Two plates are moving past one another

Question 10

Explain why there are no volcanoes at a conservative plate margin?

Answer 10

-➢ Because there is no magma