you can show how static electricity can move a tin can like a Pepsi can
see how string length affects overall spin time
For a science fair project you can do estimating solar energy potential of a house using solar lights
I was searching for the same thing and came accross this along with this page and I thought I'd answer: http://www.super-science-fair-projects.com/science-fair-projects-with-signal-lights.html I hope it is helpful.
Relate it to physics or science.
The Current Version of the First in My Series of Projects, Built in Parallel With My Other School Work, Without Resistance and Within My Capacity.
egg expiriment
One great science fair project involving chemistry for 8th grade is how to create salt flats.
see how string length affects overall spin time
go on google and type in science fair projects its that simple
Science projects
Water hopper
science buddies,free science fair projects, or just google it
Nose it all.
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A fair with the emphasis on scientific projects.
i think that on a science fair they are identifying the people who helped you and how they helped you
making scents