answers

1. a blog is a journal on line, written, read or updated. It consists of entries or posts organized newest on the top and oldest on the bottom. Some blogs include videos, quotes graphics and so on. A book is text written on paper containing several chapters or not depending on style.
2. Blogs have changed in a way that allot of people in the world share it has increased its use. Not all for the same reason since some people use the reading blog, the gossip blog, the science blog etc.
3. I might read blog for research or to comment or because I was in a searcher as Google and accidently I found it on the sources. In addition, a blog is easier to read and you can leave your comments on each post it is also a way to save paper.
4. I think it depends on the creator or on what its saying, because you never know if what the author of the blog is true or not. In books if what wrote is not true is not published, you have a freedom in blogs. Overall, I think that blogs are not such reliable source. Once again, it depends on the author.
5. My title depends on the purpose of the blog. If it is a reading blog, you should call it a reading blog. But the title can depend to your creativity.