Under the theory of plate tectonics,the plates themselves are ________.
A)discrete pieces of lithosphere at the surface of the solid Earth that move with respect to one another
B)discrete layers of lithosphere that are vertically stacked one atop the other
C)composed only of continental rocks that plow through the weaker oceanic rocks
D)very thick (approximately one-quarter of Earth's radius)

Question

Quizplus · Accepted Answer

The theory of plate tectonics states that the Earth's lithosphere is divided into several large and small plates that move relative to each other. These plates are made up of the Earth's crust and the uppermost part of the mantle, and they are the discrete pieces of lithosphere at the surface of the solid Earth that move with respect to one another.

Under the Theory of Plate Tectonics,the Plates Themselves Are ________