The difference between Community College and 4-year university?

I want to know the difference out of curiousity. I am at a community college right now, I wanted to know how is the four year universities different from community colleges besides the tuition fee and difficulty. I mean the way they teach, is it gonna be like in community college? Will they gonna tell you "turn to this page on the textbook, this is number 8," or they grade your paper with hand rather than handing things in electronically, I mean anything that is different, thanks people !!