Also there is a wonderful letter on this page that describes what a really good science project is. Check it out at
More links to Science Fair Projects:
(Remember to use your "Back" button to return to this page)
Spike's Science Projects
Kid's Corner
This site is a portal site, it links you to lots of sites that feature science project plans.
For answers to your questions try "Mad Scientists". This site will helpful when you need to understand the data you gather. That is why the stuff in your project behaved as it did.