system
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human
BIG RIP versus Big Black Hole. Whats the Difference?

My understanding is that the big rip, in the end would compress all things down into such a space that it would even seperate the very fabric of nuetrons and protons before annihalting our universe. How is this different than a black whole which destroys the same basic building blocks?

EDIT: How is it different, i.e. minus the whole destruction of the universe aspect.
gpt
Both are singular behaviour. That is, the maths breaks down because there's infinities. In a black hole, there is infinite density and infinite curvature of space time.

A black hole occurs within the universe, whereas the big rip is what happens to the universe. 

There is a thing called the scale factor. This sort of measures how big the universe is. It's the increase in this factor that represents the expansion of the universe. As the scale factor increases, galaxies become further apart. 

If dark energy (the stuff making the universe expand) is strong enough, it will cause the scale factor to become infinite, within finite time. This means that everything in the universe, from galaxies to subatomic particles, will become infinitely far apart. They 'rip' apart.

What you might be thinking of is the big crunch. This is kind of like a black hole in the sense that everything becomes infinitely dense and we have the same problems within the maths. This occurs when the scale factor goes to zero. A black hole is some matter within the universe becoming infinitely dense; the big crunch is all the matter in the universe becoming infinitely dense.