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
tectonics plates are found along plate boundaries (true/false)
true
what are the 3 types of plate boundaries?
convergent, divergent, transform
can volcanoes form at divergent boundaries?
yes
what is subduction?
when one plate slides under another
new crust is created at a transform boundary (True/False)
False
lithosphere
plates only move a few cm a year (true/false)
true
the process in which new seafloor is created to replace old seafloor is called
seafloor spreading
when an ocean and land plate collide, which one will subduct?
ocean plate
volcanoes are found at transform boundaries (True/False)
false
what is the name of the theory developed by Alfred Wegener that states the plates have drifted over time
continental drift
Why do the plates move ?
convection currents in the mantle drive plate movement.
what forms a divergent boundary between two oceanic plates ?
mid-ocean ridge
when two continental plates collide (land) what landform is created?
mountain ranges
the sliding of plates past each other can cause
earthquakes
what are the two types of tectonic plates?
oceanic and continental
in what layer of the Earth do convection currents take place?
asthenosphere
What geological feature is created by a Divergent Boundary between two continental plates
Rift Valleys
when a continental plate (land) and an ocean plate collide what landform is created?
trench
fault lines
what is pangea?
a super continent made of all the current continents together over 225 million years ago
describe how convection currents cause the plates to move
hot magma rises from the mantle and as it cools sinks back down causing the plates to move