The minimize button allows you to lower the window into the taskbar below. The window isnt closed, its just moved below so you may see other programs on your screen.
The maximize button sizes the window up to the whole screen.
The close button completely closes the window. At this point, you would have to open a new window.
The title bar (or titlebar) consists of that part of a window where the title of the window appears. It appears at the top of the window as a horizontal bar.
Scroll bars are the vertical bars you see on the side of your screen, or the horizontal bars on the bottom of the screen. By moving them up and down, or left or right, you can see elements of a web page or window that were previously unavailable due to the size of the file.