CEP810: A Web Page and a Blog ... what's the difference?

A web page is a document usually in html or in xhtml format.  A collection of related web pages is called a web site.  It is created to provide information about an individual, a company, a service or other areas that require more of a description rather than of an opinion.  A web log or blog is a collection of posts which is formatted as a series of entries with dates and titles.  It is frequently updated by an individual and may serve as a set of journal entries.  Usually, it allows readers to leave comments about the commentary, idea, or issue that has been posted.  Both a web page and a blog may include graphics, audio, video, and links to web sites and involve internet access.  So can a blog be a web page? Or can a web page be a blog? What do you think?