Here is some helpful information on how to set up your science fair project.  Of course, your science teacher can also assist you on what needs to be done as well as other students who have done projects themselves.  A science fair project is basically an exercise in using the scientific method.  So, your project presentation will display the steps of the scientific method as it relates to your project. 

Sample Science Fair Project
This project encorporates the use of the weekly energy use chart. 

Science Fair Evaluation Criteria for Judging
This is a list of criteria for judging science fair projects.  Each science fair will vary but most will include these kinds of evaluation points. 

Here are some great web sites that are devoted to students trying to put together a good project:
Discovery.Com Science Fair Central
Science Fair Project Resource Guide
SCIFAIR.ORG

NEED Project - Science Fair Projects for Kids

Marion County Public Schools uses the guidelines from Intel International Science and Engineering Fair (Intel ISEF).  You can get more detailed information at www.sciserv.org.  There are a lot of forms involved in the application process, but you will not need all of them.