Plate tectonics: plate tectonics a theory explaining the structure of the earth's crust and many associated phenomena resulting from the interaction of rigid lithospheric plates that move slowly over the underlying mantle.
continental drift if the movement of earths crust continents relative to each other by appearing to drift across the ocean bed. The concept was developed by Alfred Wegener in 1912, but his theory was rejected by some for lack of a mechanism. The idea of continental drift has been replaced by the theory of plate tectonics, which explains how the continents move.
Pangaea was a supercontinent that existed approximately 300 million years ago. It began to break apart around 200 million years ago due to continental drift.
The asthenosphere is a part of the upper mantle just below the lithosphere that is involved in plate tectonic movement and where convection occurs.
The lithosphere is the rigid outermost shell of a rocky planet defined on the basis of the mechanical properties. On Earth, it comprises the crust and the portion of the upper mantle that behaves elastically