Plate Tectonics Flashcards
1
Q
convection currents in the asthenosphere
A
what causes the movement of the plates
2
Q
transform boundary
A
a place where two plates are sliding past each other
3
Q
mid-ocean ridge
A
mountains that form along a divergent boundary where the plates are pulling apart
4
Q
rift valley
A
the landform made along a divergent boundary on land
5
Q
Pangaea
A
when all the continents were together
6
Q
plate tectonics
A
the theory that the earth is broken into plates and those plates are moving
7
Q
sea-floor spreading
A
when new oceanic crust forms as magma rises towards the surface and solidifies at divergent boundaries
8
Q
convergent boundary
A
when two plates collide
9
Q
divergent boundary
A
when two plates move away from each other
10
Q
subduction
A
when one plate goes under another
11
Q
trench
A
formed when two plates collide
