The area where two neighboring tectonic plates move away from one another is called an areas boundary?
A divergent boundary is an area where two neighboring tectonic plates move away from one another. It can also be called a divergent plate boundary, constructive boundary or extensional boundary.
These are plate boundary where there is relatively little or no creation of new crust or destruction of old crust. At the conservative plate boundary, tectonic plate move side by side horizontally sliding pass one another and berely interacting but only leading to the formation of a kind of line in-between called tranform fault or transform fault line. So it just seem as if the lithosphere in such boundary is conserved and preserved.
The Ural mountains are a theoretical boundary only. They are not on a plate boundary. They have traditionally marked the border between Europe and Asia, but this is an historical and notional boundary, from before our ideas of continents were based on tectonic plates. In fact Europe and Asia are one unit, often called Eurasia.