convection currents Flashcards
1
Q
tectonic plates=
A
they float on top of the magma beneath the mantle. the direction of the plates moving and the type of plate margin is determined by which way the convection currents are flowing
2
Q
ridge push=
A
when the magma reaches the ridge it cools to form new crust. the new crust pushes the old rock away
3
Q
slab pull=
A
gravity pulls down on the dense oceanic plate causing it to subduct into the mantle
4
Q
upwelling=
A
when the hot molten mantle rises
5
Q
gravitational sliding=
A
gravity pushes the plates further away which widens the gap
