http://www.sciencebuddies.org/science-fair-projects/project_research_paper.shtml <--- This is a very good source for your science fair research paper.
http://www.crlsresearchguide.org/
http://mset.rst2.edu/portfolios/l/lautz_s/Science%20Fair%20Handbook/Researchpaper.html <-- This is also a very good source for your science fair research paper.