Divergent (constructive) plate margins

Question 1

What is the direction of plate movement?

Answer 1

Plates move APART. (they spread)
Ridge push

Question 2

Explain ridge push

Answer 2

-occurs due to convection current
-As magma rises, it forces the crust to rise at the ridge.
-Gravity forces it away from the margin, thus driving the crust

Question 3

Examples of where divergent margins are found

Answer 3

Mid Atlantic ridge:
- north and south american plates moving away from Africa and europe

Question 4

what is formed at divergent margins

Answer 4

-shield volcanoes
-earthquakes occur
-large rift valley forms

Question 5

what focus earthquakes occur at divergent margins

Answer 5

shallow focus

Question 6

How are volcanoes formed at divergent plate margins

Answer 6

-magma pours into splits between plates
-lava solidifies to become new ocean crust

Question 7

Talk about volcanic activity at divergent plate margins

Answer 7

-non violent eruption
-lava is fluid and mobile