An article is a stand-alone section of a larger written work. These nonfictional prose compositions appear in magazines, newspapers, academic journals, the Internet or any other type of publication.
While a blog (a contraction of the term "weblog") is a type of website, usually maintained by an individual with regular entries of commentary, descriptions of events, or other material such as graphics or video. Entries are commonly displayed in reverse-chronological order. "Blog" can also be used as a verb, meaning to maintain or add content to a blog.