The effect of temperature on the corrosion of aluminium
The hypothesis that only the aluminum plates that were stored at a sufficiently high temperature will corrode, has been proven to be true.
Aluminum has very good corrosion resistance, and its electrical conductivity and thermal properties make it really easy to work with. The recent increase in global copper prices has increased the demand for aluminum to be used in wire and cables.
Will the results differ if this science fair project were to be repeated by immersing the aluminum plate in water, salt water and acid at high temperatures?
You could also try placing the aluminum plates in solutions of different pH levels.
Aluminum corrosion - http://corrosion-doctors.org/MatSelect/corralumin.htm
Cast Nonferrous: Corrosion of Aluminum and Aluminum Alloys -http://www.keytometals.com/Article14.htm
Temperature - http://www.corrosionsource.com/technicallibrary/corrdoctors/Modules/Aircraft/tempera.htm