Plate Boundaries Flashcards
Where are volcanoes and earthquakes more likely to occur?
Plate boundaries
How long ago was the “super continent” and what was it called?
250 million years ago, it was called Pangea
What is the direction of movement in a divergent plate boundary?
Moving apart from one another
What crusts are involved in a divergent plate boundary?
Oceanic and oceanic
What are the major landforms that result in divergent plate boundaries?
Oceanic ridges and islands
How do volcanoes form in divergent plate boundaries
When magma escapes and gets pushed upwards from the mantle
In what direction do convergent plate boundaries move ?
They collide into each other but subduction occurs (one plate goes under the other)
What’s a hotspot?
A place in the Center of a plate where magma rises causing the lithosphere to melt and therefor pushing magma to the crust forming volcanoes
What crusts are involved in convergent plate boundaries?
Oceanic and continental
What is the major landform from the movement of convergent plate boundaries?
Mountains
Name two plates on a divergent plate boundary
African and South American plate
Are the earthquakes in convergent plate boundaries larger or smaller than divergent plate boundaries?
Larger
In what direction do collision plate boundaries move?
Towards each other and they collide
What types of crust are involved in collision plate boundaries?
Continental and continental
What is the major landform from collision plate boundaries and why?
Fold mountains as the plates are forced upwards when they collide
What is the reason for earthquakes in collision plate boundaries?
Due to the build up of friction and pressure
What direction do conservative plate boundaries move?
They slide past each other
What are the types of crust involved in conservative plate boundaries?
Continental and continental
Are any major landforms created in conservative plate boundaries?
No
Why doesn’t volcanoes occur at conservative plate boundaries?
As no land is being destroyed so no magma is created
At what plate boundaries do earthquakes occur?
Convergent, divergent conservative plate boundaries and collision
At what plate boundaries do volcanoes occur?
Divergent and convergent
True or false
Subduction occurs at divergent plate boundaries
False it occurs at convergent plate boundaries
Which plate boundaries involve movements of the same crust?
Divergent, collision and conservative
Name two plates on a convergent plate boundary
Nazca and South American plate
Name two plates on a conservative plate boundary
Antarctic and South American plate
