Divergent Boundaries
what is a divergent boundary?
where two plates move apart or diverge
what is a convergent boundary?
where two plates come together, causing a collision where one plate is subducted
what is a transform boundary?
where plates slide past one another moving in opposite directions
where two plates meet
What is an earthquake ?
a sudden shaking of earths surface
what happens at divergent plate boundaries?
rock rises from the mantle then hardens which adds new solid rock to the edges of both plates
what is subduction?
when one plate slides under another
what happens to the crust at a transform boundary?
crust is neither created or destoryed
What is land like underneath earths surface?
no matter what is on top there will always be hard solid rock at the bottom
what happens when plates move ?
-earths surface slowly changes
-create and destroy ocean basins
-produce earthquakes and volcanoes
-form mountains and plateaus
what happens to crust at the divergent plate boundary?
crust can be created
what happens when two continental plates pull apart?
sea floor spreading
what is a real life example of a transform boundary?
the san andreas fault
what is the mantle made of?
soft solid layer of rock
Why do the plates move ?
convection currents in the mantle drive plate movement.
what forms a divergent boundary between two oceanic plates ?
convection at the mantle
sea floor spreading
where can you find transform boundaries?
canada / alaska / new zealand / california
what to tectonic plates consist of?
oceanic and continental crust / solid rock
What is earths outer layer made out of ?
hard solid rock
What geological feature is created by a Divergent Plate Boundary?
Rift Valleys / mid - ocean ridge
what geological feature can be created by a Convergent plate boundary?
mountain chain / sea floor trench
what is one geological feature that is created by a transform boundary?
earthquakes
what is pangea?
a super continent made of all the current continents together over 225 million years ago
how do tectonic plates interact?
they pull apart, slide past each other and collide