Exploratorium
Exploratorium: Science Snacks: Snacks From a Z
Here is a monumental list of ideas for science fair projects and experiments, organized alphabetically. Every one of them is a link to a full page, with pictures, of information about the idea. This site is a goldmine.
Science Buddies
Science Buddies: Veggie Snap! Modifying Bending Stresses in a Flexible Rod
Examples of the effect of bending stresses on flexible rods could include a large tree bending over to the ground, or a fishing pole bending till it snaps. Scientists actually study this phenomenon and discover ways to prevent breakage,...
Science Buddies
Science Buddies: Solid Motor Rocket Propulsion
What does it take to launch a satellite to explore Mars, or a mission to the moon? This project has several possible variations for exploring the physics of rockets. This is rocket science.
Science Buddies
Science Buddies: How Do Baseball Stadium Dimensions Affect Batting Statistics?
Here's a fun project that combines baseball and math. Major League baseball is played in ballparks that have their own individual quirks when it comes to the exact layout of the field. Fenway Park in Boston has the famous "Green Monster"...
NOAA
Noaa: Environmental Restoration
Your questions answered about environmental restoration after chemical accidents. A large section is dedicated to oil spills and how they contaminate the earth. Great information.