Plate Boundries

Question 1

What land form is associated with continental - continental (collision) and oceanic - continental subduction?

Answer 1

Young fold mountains

Question 2

What land form is associated with a constructive boundary under land?

Answer 2

Rift valley

Question 3

What landform forms at a constructive boundary under the sea?

Answer 3

Mid ocean ridge

Question 4

What land form forms with oceanic-oceanic and oceanic continental (both subduction)

Answer 4

Deep sea trench

Question 5

What land form is associated with oceanic oceanic subduction?

Answer 5

Island arcs

Question 6

Formation of young fold mountains

Answer 6

Two plates meet and continental crust is deformed (orogeny) into fold mountains

Question 7

What are severely folded rocks called?

Answer 7

Nappes

Question 8

Formation of island arcs

Answer 8

Two plates meet and the denser plate subducted beneath the other. The subducted plate melts and creates more magma in the Benioff zone which rises through faults in thr curst to form volcanoes

Question 9

What is the Benioff zone ?

Answer 9

An area where friction is created between the two plates colliding. The zone corresponds with the subducting plate.

Question 10

How is a deep sea trench formed?

Answer 10

Two plates meet and the denser plate is subducted beneath the other. The subducting plate leaves a gentle slope whilst the other has a steer side and an accretionary wedge from.

Question 11

How do the sides of the rift valley differ?

Answer 11

One has a gentle slope
One has a steer side and an accretionary wedge

Question 12

How is a mid ocean ridge formed?

Answer 12

Two plates move apart, the rising mantle deforms the lithosphere causing it to rise up to 4000m
Rising magma can solidify into submarine volcanoes

Question 13

How high can the lithosphere rise up by during the formation of a mid-ocean ridge?

Answer 13

4000m

Question 14

Formation of a rift valley

Answer 14

Two plates move apart causing the centre to collapse into a graben leaving horsts on either side, this eventually forms a new ocean

Question 15

Hazards associated with constructive boundary under the sea (mid-ocean ridge)

Answer 15

Shallow focus earthquakes and volcanoes

Question 16

Hazards associated with oceanic-oceanic and oceanic-continental (subductive/ deep sea trench)

Answer 16

Shallow intermediate and deep f focus earthquakes
Volcanoes

Question 17

Hazards associated with continental-continental (collision) and oceanic-continental subduction)

Answer 17

O-C shallow intermediate and deep focus earthquakes and volcanoes
C-C shallow focus earthquakes

Question 18

Hazards associated with oceanic-oceanic and continental-oceanic (island arcs)

Answer 18

Shallow + intermediate focus earthquakes and volcanoes

Question 19

Hazards associated with constructive boundary under land

Answer 19

Shallow focus earthquakes and volcanoes

Question 20

Example of young fold mountains

Answer 20

Himalayas (C-C)
Andes (O-C)

Question 21

Example of a rift valley?

Answer 21

The East African Rift Valley

Question 22

Example of Mid-Ocean ridge ?

Answer 22

The Mid-Atlantic Ridge

Question 23

Example of deep sea trench?

Answer 23

Mariana Trench (O-O)
Peru-Chile trench (O-C)

Question 24

Example of island -arcs

Answer 24

The Mariana islands