17.9.24

Question 1

Calderas

Answer 1

A large volcanic crater, from which volcanic material is emitted

Question 2

Fissure eruptions

Answer 2

Where lava erupts from several points or vents simultaneously (evident in Hawaii)

Question 3

Description of mantle convection

Answer 3

Movement of the mantle as it transfers heat from the core to the lithosphere

Question 4

Description of slab pull

Answer 4

Where subduction is occurring the force slab pull is created as the plate begins to sink into the mantle

Question 5

Description of subduction process in the Benioff zone

Answer 5

Slab pull being thrust downwards in a subduction zone. Multiple earthquakes produced at different depths

Question 6

Description of ridge push

Answer 6

As the lithosphere is formed at divergent plate margins is hotter and less dense than the surrounding area. Slide sideways away from high areas.
Movement is enhanced by slab pull

Question 7

Description of sea floor spreading

Answer 7

Huge mid ocean ridges from when hot magma is forced up from the asthenosphere and hardens forming a new oceanic crust. This new crust pushes the tectonic plates apart in sea floor spreading

Question 8

Benioff zone

Answer 8

Is an area of seismicity corresponding with the slab being thrust downwards