A black hole is called that because when viewing it with the naked eye (visible light spectrum), the phenomenon appears to be a 2-D "hole" in space (or spacetime.) An actual Black Hole is much more...
When a huge star dies it's core becomes so dense it's own gravity starts to crush and collapse inwards the heart of a black hole is called the (Singularity)
No. Black holes are just extremely dense objects whose gravitational pull is so strong that even light cannot escape them. That is why they appear black.
A black hole is a singularity, an incredibly large amount of mass reduced to a very small volume, essentially a single point. At that compression, the ordinary rules of atoms and motion cease to...
No, a black hole is caused by a massive star dying out. An ozone hole is caused by air pollution. They are two different things. (lol, I know about this because I'm learning it in Science class!) ;)