Plates Flashcards
1
Q
continental plate
A
thin, cant sink
30-70km
1500 million years
2
Q
oceanic plate
A
heavy, sink
6-10km
under 200 million years
3
Q
what are convection currents
A
heat from core melts rocks to the upper mantle and when they cooldown they drag plates
4
Q
constructive margin
A
plates move away from each other
creates volcanoes
5
Q
destructive margin
A
two plates towards/against each other
oceanic goes under, cont up
jam, pressure builds, release earthquake
6
Q
conservative margin
A
move same direction
one faster than other
stick together, pressure builds - releases earthquake
7
Q
how to answer a question about the distribution of earthquakes
A
distribution and where they happen
