Ill just summarize it: Wormhole - Tear in the universe from one location to another allowing rapid succession through it to reach a set destination. Ex - Stargate and how they teleport through the universes. Blackhole - Something that basically has a massive gravitational pull and basically splits molecules until there is nothing left. Where these things go is unknown, all that is known is that it has a massive gravitational pull and enough power to crush things, its considered one of the few places NO light can possibly reach because as soon as it reaches the black hole it becomes nothing. Whitehole - Just a theory that if something did happen to come out the back of a blackhole, it would be the opposite of a black hole, aka a white hole. It would recreate things as they origionall were, etc. Basically thats a quick look at it.
Blackholes were stars, and I don't want to get into detail what happens so it happens. Did you know a black hole is the size of a city block? (science channel)
did you know that the blackhole, the whitehole and the wormhole are also all unproven and simply scientific theories? lol