Black Holes, Wormholes & the Movies

A place from which nothing can escape, not even light, is call a black hole.  Once thought to be only a mathematical curiosity, astronomers now think they are real.  The theory of relativity also predicts the existence of wormholes that connect different regions of the universe.  Popular movies have shown black holes as places of great destruction and wormholes as a way for instantaneous travel across the galaxy.  But is any of this true?  Did Hollywood get it right?  Suitable for ages 12+