Because a theory in everyday life is different than a theory in science.
This site explains it well:
look at link below.
A theory that says the lithosphere is divided into plates that move around on top of the asthenosphere is called '' plate tectonics''
Fault.
Fault.
its called tectonic plate
Plate tectonics is the scientific theory that Earth's surface is broken up into huge, slow-moving slabs called tectonic plates. The movement of these plates drives many geologic processes including most earthquakes and volcanoes. Plate boundaries are the areas where two tectonic plates meet.
A theory that says the lithosphere is divided into plates that move around on top of the asthenosphere is called '' plate tectonics''
The crustal movement of the plates in the earth are not completely understood by scientist and considered a phenomenon. It is an accepted theory that the strength of the water in contrast to the weakness of the land make the movement of the plates.
They are both caused by movement of tectonic plates.
That would be the theory of plate tectonics.
The Theory of Plate Tectonics?
Fault.
Fault.
Fault.
its called tectonic plate
the theory of plate tectonics is that subduction occures on the edges of the tectonic plates creating a movement. When the tectonic plates push or pull apart with enough pressure an earthquake starts. That is why California has major earth quakes. The pacific plate is grinding California in a horizontal movement. Once the pressure is released a tsunami could happen.
tectonic shift
plate tectonic theory