[ so the hole is plugged by matter and it evaporates because nothing can get in yo fuel it. ]
It evaporates due to this: http://en.wikipedia.org/wiki/Hawking_radiation
The smaller the hole, the faster it evaporates, unless you add matter at a faster rate than it evaporates.
Basically in empty space there are particles and anti-particles that pop in and out of existence that then combine and annihilate one another.
If they pop into existence close to a black hole one particle gets eaten by the black hole and the other can escape causing the net loss of energy ie. mass to the black hole.
thanks for the link, I will read it. I’ve heard of hawking radiation, but never read up on it.
You seem very knowledgeable Grace. Is this your field of study?