Defininition ...
Is plate tectonics a "driving force?"
Tectonic features
The concepts are related yet different. If it is a priority goal for students to envision the "conveyor belt" motion of the seafloor, it may be important to clarify the two concepts. Most people find it easy to conceptualize moving continents, but they don't envision how this is tied to processes in the ocean.
Is continental drift a scientific theory?