Solar wind fair
Ultimately, yes, since the reason there is wind in the first place is differential solar heating.
Solar powered car, wind car.ect.
For a science fair project you can do estimating solar energy potential of a house using solar lights
ask.com and answer.com
Green energy is energy that comes from a non-polluting source, and is environmentally friendly. The main sources of green energy are solar, wind, hydro, and geothermal. The most popular are wind and solar. Wind turbines and solar panels generate a fair amount of energy. If you would like to learn more, you can read the articles here: http://how-tobegreen.blogspot.com/
I would suggest that you do create a wind turbine, and then show how the kinetic energy is turned to energy that can be used. You can include the science factors of this and then the global affects of not using renewable sources. hope that's helped!
"Blowing in the Wind"
yes
a good science fair project about energy is a water cycle and would be put in the Energy Awareness category
solar system, mice, etc.
I did a science fair project too. I won. Anyway... If you are doing a project, you want to rove something, not just do a demonstration because that is NOT what they are looking for. I would do something that you are capable of doing and if you don't know what to do . Then, do something like wind energy or robots and maybe you could win your science fair project.
Decomposition, energy, light, electricity, and photosynthesis are all good science fair topics