science for teenagers

[burnhal]

I need to find some decent experiments on any aspect of science for teenagers- got a lot of stuff suitable for younger kids but they are a bit tame for teens- would be nice, but not neccesary, if they involved alternative energy. Need to be do-able in fifteen mins or less, have an air of daring or danger about them- the Brainiac touch!! and need to be dirt cheap!! Any thoughts??? Oh- and they will be done outdoors. (Not asking much am I!!)

[Clanad]

Here's a good selection!

http://www.sciencetoymaker.org/ (My group especially liked the water bottle rocket)

More:

http://journal.copernicus.org/en/content/view/ 29/45/
http://journal.copernicus.org/en/content/view/ 16/39/
http://www.west.net/~science/feedback_CO2.htm (Lots of these involve dry ice but the kids enjoy the results)

Best luck!

[burnhal]

Thanks for these sites! I have used the water bottle rockets umpteen times and they are great fun but there is a lot there that I havent used.
Your Group??????? Scout? Cubs maybe?