Restless Earth - Destructive plate boundary

Question 1

What happens at a destructive plate boundary - STEP 1?

Answer 1

Convection currents in the mantle cause plates to move together.

Question 2

What happens at a destructive plate boundary - STEP 2?

Answer 2

Oceanic crust is forced under the continental crust as it is heavier.
The build up of pressure here can be released as an earthquake.

Question 3

What happens at a destructive plate boundary - STEP 3?

Answer 3

Oceanic crust is destroyed due to the heat in the subduction zone.

Question 4

What happens at a destructive plate boundary - STEP 4?

Answer 4

Heat and pressure causes the magma to rise to the surface.

Question 5

What happens at a destructive plate boundary - STEP 5?

Answer 5

The lava erupts onto the surface.

Question 6

What happens at a destructive plate boundary - STEP 6?

Answer 6

Over many years many eruptions occur and layers of ash and lava build up forming a composite volcano.

Question 7

Describe the diagram…

Answer 7

2 arrows pushing towards each other saying continental and oceanic crust.
Oceanic crust is half way under the continental crust.
A composite volcano on top of the continental crust.