6th grade. peripheral vision. whether age, race, gender, etc. was correlated to how far out people's peripheral vision extended. (did a bunch of tests on a bunch of people)
I did some experiment where I tried to mess with ants' sense of direction by using radio waves sent out by an antenna. Not realizing they 'see' by pheromones or something. I think I got a C or a D on that.
Potential Energy vs Kinetic Energy. I made a "J" out of a 40 X 4 inch piece of balsa wood. I would release different sized marbles from the top of the J and measure how far they flew. The landing pad was lined with carbon paper to give an accurate measure of the landing location. 8th grade
Come to think of it, I don't think I participated in a single science fair between 3rd grade and my last year of college. Of course, the project from college wasn't really a "science fair" per se. It was more a of an end-of-the-year engineering showcase type of thing. Anyway, the one I did in 3rd grade was on pendulums. I hung washers of different sizes from a coathanger, demonstrating that the weight of the pendulum has no bearing on how fast it swings. The length of the string was what caused the pendulum to swing slower/faster. For the one I did in college, I created bell-like tones and music using three oscillators on a circuit board. I modulated the frequency of one oscillator with another one, thereby creating sidebands in the frequency spectrum and making dissonant sounds like a bell. I used the third oscillator to shift overall frequency up and down to play notes. Yeeeeah...there was a pretty big gap in complexity between the two projects. EDIT: And of course as fate would have it, nowadays I sit on my ass in front of a computer typing crap in Microsoft Word for a living. Great use of my education if you ask me.
