Bibliography is a specialized aspect of library science (or library and information science , LIS) and documentation science . The founder of documentation, Paul Otlet , wrote about "the science of bibliography".   However, there have recently been voices claiming that "the bibliographical paradigm" is obsolete, and it is not today common in LIS. A defense of the bibliographical paradigm was provided by Hjørland (2007).  The quantitative study of bibliographies is known as bibliometrics , which is today an influential subfield in LIS.  
When you are writing your report, you will use the sources in your bibliography to remind you of different facts and background information you used for your science fair project. Each time you use some information from a source, you will need to cite the source that it came from. To cite a source, simply put the author's name and the date of the publication in parentheses (Author, date) in your text. If the person reading your report wants to find the information and read more about it, they can look up the reference in your bibliography for more detail about the source. That is why each source you use must be listed in a detailed bibliography with enough information for someone to go and find it by themselves.