2.2 Constructive plate margins Flashcards
1
Q
How do constructive plate margins move
A
move apart
2
Q
Give an example of a constructive plate margin
A
Eurasian and North American
3
Q
what rate do constructive plate margins move in a year
A
6cm
4
Q
Why are earthquakes and volcanoes found at constructive plate margins
A
- Hot magma rises between the plates
-Tectonic plates move away from each other by ridge push and slab pull - Magma cools to form a new plate
5
Q
Where is the Mid Atlantic Ridge located
A
along a constructive plate margin
6
Q
What are Rift valleys
A
Steep-sided valleys that form at constructive plate margins
7
Q
What is a plate margin
A
The point at which two plate meet and where seismic waves are released
8
Q
What is ridge push
A
force pushing plates apart at mid-ocean ridges
9
Q
What is slab pull
A
force pulling plates down at subduction zones
