Plate Boundaries

Question 1

Name 3 plate margins?

Answer 1

Destructive
Constructive
Conservative

Question 2

Name the 3 types of destructive margins?

Answer 2

Oceanic-Oceanic
Continental-Continental
Oceanic-Continental

Question 3

What is an example of oceanic-oceanic plate margin?

Answer 3

South America

Question 4

What is an example of continental-continental plate margin?

Answer 4

Himalayas

Question 5

What is an example of oceanic-continental plate margin?

Answer 5

Indonesia

Question 6

What is an example of constructive plate margin?

Answer 6

Mid-Atlantic Ridge - Iceland

Question 7

What is an example of conservative plate margin?

Answer 7

San Andreas USA

Question 8

What is an example of a mantle plume?

Answer 8

Yellowstone

Question 9

What happens if the collision at destructive plate margin is with 2 continental plates?

Answer 9

There will be a young fold mountain range along with the volcanoes

Question 10

What happens if the collision at destructive plate margin is with 2 oceanic plates??

Answer 10

There will be an island arc, a curved line of volcanic islands e.g Indonesia

Question 11

When do earthquakes occur and what is the zone called?

Answer 11

At shallow depths under the oceanic trench and get progressively deeper.

Benioff zone

Question 12

What does the Benioff zone mark?

Answer 12

The subduction of one plate underneath another

Question 13

What happens when 2 oceanic plates converge?

Answer 13

The denser crust subverts the other

Question 14

What happens when a collision at the destructive plate margin is with an oceanic-continental plate?

Answer 14

A trench is created due to subduction
Also form of earthquakes, volcanic mountain ranges and volcanoes

Question 15

What happens when oceanic and continental plates meet??

Answer 15

Oceanic crust sinks or subducts below less dense and lighter continental crust

Question 16

What does the oceanic crust being subducted lead to formation of?

Answer 16

Trench

Question 17

What does the process of oceanic-continental plates meeting form?

Answer 17

Deep ocean trenches, volcanic mountain ranges known as continental arcs

Question 18

How are intense earthquakes and volcanic activity created by the oceanic-continental plates meeting?

Answer 18

Caused due to melting of the subducting oceanic crust which generates magma that rises to form volcanoes and build up of pressure for earthquakes

Question 19

How does a mid-ocean ridge occur at constructive margins?

Answer 19

When convection currents rise in the mantle beneath the oceanic crust and creates magma where the 2 tectonic plates move away from each other at a divergent boundary

Question 20

What is at the centre of the mid-ocean ridge?

Answer 20

Axial rift

Question 21

How are axial rifts formed?

Answer 21

By pairs of faults

Question 22

What is the landform at conservative plate margins?

Answer 22

The fault itself

Question 23

What doesn’t occur at conservative plate margins?

Answer 23

No subduction meaning no crust melted to form magma - no volcanic activity

Question 24

What is a hot spot?

Answer 24

A volcano generally away from a plate boundary

Question 25

How are hot spots caused?

Answer 25

By mantle plumes

Question 26

What is a mantle plume?

Answer 26

A vertical column of extra-hot magma that rises up from the mantle

Question 27

How do mantle plumes show plate movement?

Answer 27

Chains of volcanoes are produced and the mantle plume is stationary but the plates moves across the head of the plume which causes magma to be produce and this produces volcanoes

Question 28

What happens as the plate moves with the mantle plume?

Answer 28

Volcanoes stop erupting and a new volcano forms producing a volcanic chain

Question 29

What are features of mantle plumes under oceanic crust?

Answer 29

These produce shield volcanoes

Question 30

What are features of mantle plumes under continental crust?

Answer 30

Produces large calderas volcanoes with very explosive eruptions

Question 31

What occurs at constructive margins?

Answer 31

2 plates moving apart - diverging

Question 32

What occurs at destructive margins?

Answer 32

2 plates moving towards - converging

Question 33

What occurs at conservative margins?

Answer 33

2 plates going past each other