Which of the following statements is not a part of the theory of plate tectonics? a. plates float on top of the earth’s mantle. b. the earth’s plates never move. c. tectonic activity happens at plate boundaries. d. the earth’s crust is composed of many plates.

This image shows a volcanic eruption in hawaii with lava flowing into the sea. which statements best describe this eruption? check all that apply. its magma is high in silica. its magma has low viscosity. its lava came from a quiet eruption. its lava sets fire to everything in its path. its lava came from an explosive eruption.