Volcanoes Flashcards
1
Q
How is the vent made
A
When two plates collide or separate, magma can rise from the mantle to fill the space that opens in the crust
2
Q
What are the stages of volcanoes
A
Active , dormant and extinct
3
Q
When does a destructive volcano form
A
When two plates separate
4
Q
Where do volcanoes form
A
Ar destructive plate boundaries where two plates collide
5
Q
What is magma called when it is out of the crust
A
Lava
6
Q
Constructive plates : when two plates separate magma erupts to the surface and cools rapidly on the ocean floor lava builds up . What forms ?
A
Mid ocean ridge
7
Q
Which plate is usually heavier oceanic or continental
A
Oceanic
8
Q
Fold mountains : synclines and anticlines , which one sinks down
A
Synclines
