Plate Tectonics Theory Flashcards
1
Q
Based on idea that…
A
Convection currents exist within mantle
2
Q
Hot magma…
A
Forces its way through weak parts in crust
3
Q
At mid oceanic ridges…
A
It will rise through fissures in the ocean floor, cooled by seawater, volcanic mountains, force plates apart
4
Q
If two plates are pushing apart..
A
Opposite edges collide with continental plates, crust is forced downwards, melted back into mantle, deep ocean trenches
5
Q
Explains occurrence of…
A
Moving continents, mid oceanic ridges, deep sea trenches, earthquakes
