By Mayo Clinic Staff. Erectile dysfunction â the inability to get and keep an erection firm enough for sex â is a common problem. You've likely seen advertisements for erectile dysfunction herbs or supplements to increase your sexual performance..
plate tectonics. In geology, a theory that the Earth's lithosphere (crust and upper mantle) is divided into a number of large, plate-like sections that move as distinct masses. See Notes at fault, Gondwanaland, See more at tectonic boundary.
No they are not the same thing.    Plate Tectonics is the study of mechanisms and the results of  large-scale movement of the earth's crust.    Tectonic Plates â¦ are large sections of the earth's crust that float  on top of semi-molten rocks of the upper mantle. 3 people found this useful.