In this project you will make a set of magnet rings to float above each other while their balance is maintained using a wood dowel. You will then examine the flexibility of the floating rings and propose uses for such a floating set of rings.
http://www.freesciencefairproject.com/projects/simple_magnet_levitation.html
For many years, energy of moving water has been used to grind grains and run machinery such as wood working, knitting and cutting machinery.
http://www.freesciencefairproject.com/physics/water_turbine.html
Wind is a form of solar energy that occurs when the sun heats the air, which causes the air to rise, creating a vacuum.
http://www.freesciencefairproject.com/physics/wind_turbine.html
This clock is citrus-powered
http://pbskids.org/zoom/activities/sci/lemonbattery.html
Electricity: charge it and pass it on!
http://pbskids.org/zoom/activities/sci/lemonbatteryii.html
Create a buzz of your own.
http://pbskids.org/zoom/activities/sci/staticelectricity.html
This simple experiment shows you how to demonstrate magnetic shielding and explains how it works.
http://www.exploratorium.edu/snacks/magshield/index.html
If the solar cell is placed perpendicular to the sun's rays, the power going to the cell will be maximized
http://www.collaboratory.nunet.net/timber/scifair/eigthc/3.htm
The magnetic field around a permanent magnet, like the gravitational field around a massive object, is not only invisible, but hard for students to comprehend.
http://www.eduref.org/cgi-bin/printlessons.cgi/Virtual/Lessons/Science/Earth_Science/EAR0022.html
The purpose of this experiment was to determine how different temperatures affected the voltage (mV), the current (mA), and the power (watt) generation of a solar cell.
http://www.selah.k12.wa.us/JHS/Brown/CALEBCSCIPROJ.HTML#top