Question

Which layer of the earth pictured above is broken up into plates that flow very slowly because convection currents? This slow motion is the cause of plate tectonics, a process associated with continental drift, earthquakes, volcanoes, and the formation of mountains.
A inner core
B outer core
C asthenosphere
D lithosphere

Answer 1

D — lithosphere.

The lithosphere is the rigid outer shell (crust + uppermost mantle) broken into tectonic plates. Those plates move slowly over the ductile asthenosphere due to convection in the mantle, causing continental drift, earthquakes, volcanoes and mountain building.