plate margins Flashcards
1
Q
name 3 types
A
destructive,constructive,conservative.
2
Q
destructive
A
2 plates moving towards each other.
- oceanic plate meets continental plate. denser oceanic plate is subducted and destroyed creating gas rich magma.
- volcanoes and ocean trenches occur here.
3
Q
Constructive
A
2 plates move away from each other.
-magma rises , fills gap and cools creating new crust.
4
Q
Conservative margins
A
2 plates moving sideways past each other, or same direction at different speeds.
-crust is not created or destroyed.
5
Q
continental crust is…
A
thicker and less dense.
6
Q
oceanic crust is…
A
thinner and more dense.
7
Q
place where plates meet is called…
A
plate margin/boundary.
