Constructive (divergent) plate boundaries Flashcards
1
Q
Plates are pulled apart by the ………. in the mantle below
A
Convection currents
2
Q
As magma solidifies, what happens?
A
The plates are forced apart, allowing more magma to rise.
3
Q
An example of a volcaic island?
A
Iceland
4
Q
An example of two plates that are moving away from each other?
A
The Euraisn plate is separating from the North American plate.
5
Q
Are the valcanoes at divergent boundaried more or less explosive than those at convergent plate boundaries? Why?
A
Less, because the magma contains less silica and as a result the gases can escape easily.
6
Q
Give an example of a mid-ocean ridge
A
Mid-Atlantic Ridge
