It depends on the type of material and the extent of the copying. There are excellent discussions of copyright for educators at the link below.
no it is illegal
It is not illegal to make a copy of a check. It would only be illegal for you to try to cash a copied check.
It is illegal when you copy and paste without the owner's permission. It is illegal because you are taking it and saying it is yours.
Making a copy of a movie that you own is not illegal. To give or sell it to someone else is. To make a copy of someone else's movie is illegal. Basically, if you make copy to avoid paying for the movie, it is illegal.
Yes, it is illegal to copy a birth certificate without proper authorization.
of course no
depends on what kind of disk you have. music disks you can copy but it is not illegal unless you sell it. dvds are illegal to copy in the first place.
It is illegal to forge them
Taking something and using it when it is copyrighted. Like taking a song from youtube that isn't the original copy and recopying it from youtube to a cd, it's downloading it when you can buy the original copy. TS, using it puplicly and not for private use only. I wouldn't recommend doing it though.
It's not illegal to get a copyright. It's illegal to break copyright laws. People work hard on something and get it copyrighted, so it's unfair if you use a copy of it, claim it for yourself, or use it when you aren't permitted. This includes applications like LimeWire, which should be illegal.
work that is not your own.
yes