Tectonic plates Flashcards
What is the definition of the plate boundary
Constructive?
Where plates are moving away from eachother
Definition of plate boundary
Destructive ?
Plates moving towards eachother
Definition of plate boundary
Collisions?
2 continental plates are moving towards eachother and collide forming a fold mountain
Definition of plate boundary
Conservative ?
Plates are moving alongside eachother
Earthquakes happen because of
The structure of tectonic plates
Where do earthquakes happen more often?
Where plates are closer together
How many main tectonic plates are there
7
Tectonic plates are
Stiff
When plates collide it creates an
Earthquake
When plates move away
It creates a land split
What are the earths layers ?
Inner core
Outer core
Mantle
Crust
What are the 4 plate boundries?
Constructive
Destructive
Collisions
Conservative
How much does a tectonic plate move every year in cm?
5
Constructive moving is when…
Oceanic plates are moving a part
What does the moving of oceanic plates allow?
Magma to reach the crust and cool down it then creates rock and forms new land
What plates take part in destructive plate boundries? What happens?
Oceanic plate and continental plate
One will go underneath the other, when the oceanic plate goes underneath th other plate a deep valley in the sea. Creating an ocean trench
What is an ocean trench?
An ocean trench formed after a destructive plate boundary . It is the deepest section of the ocean
Big earthquakes happen as a result of destructive plate boundary, why?
Because of the build up in pressure between the two plates
