Plate Boundaries
which direction do divergent boundaries move?
apart from eachother
what is magma?
melted rock under ground
what a mid-ocean ridge?
sea-floor mountain
what causes an earthquake?
plate tectonics colliding
what is denser continental or oceanic crustand why?
oceanic because of the water pushing down on it
which direction to convergent boundaries move?
towards eachother
what is mantle?
a layer of rock in eaths structure
which way do the plates move to form mountains?
pushed up
What's a volcano?
a mountain filled with magama
What's a deep-ocean trench?
a sunken place in the ocean floor
which plate gets pushed down when it's either oceanic or continental and what does it form?
the oceanic plate and its subduction and makes a deep trench
what is subduction?
when two plates converge and the denser plate goes under
which way do the plates move to form deep-ocean trenches?
the denser gets pushed down
what makes an earthquake-prone area?
having lots of plates near it
which direction do transformation plates move?
slide passed each other in opposite directions
which plate gets pushed down when it's oceanic and oceanic and what does it make?
the denser one gets pushed down and its subduction and a deep trench is formed
What's sea-floor spreading?
a process at a mid-ocean ridge where magma rises and forms new crust?
which way do the plates move to form rift valleys?
whats the most earthquakes prone area?
china
what do you get if there is a divergent boundary in between two pieces of oceanic crust?
mid-ocean ridge and sea-floor spreading
what happens when there is a convergent plate in between two pieces of continental crust and why?
it's not dense enough so they get pushed up and form mountains
what is convection?
movement of liquid or gasses when the heat goes up and coldness goes down
which direction do the plates go to form a volcano?
passed eachother
did you like this?
yes
what do you get if there is a divergent boundary in between two pieces of continental crust and what can it become?
rift valley that can fill with water and become a new ocean floor