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Corning Museum Website- Specialty Glass. 'Borosilicate glass, the specialty material used to make Corning’s iconic PYREX labware, gets its name from the use of boric oxide added to a composition of silica and other elements. It works well for labware because of its very low thermal expansion coefficient. In other words, its rate of expansion under heat is about one-third that of ordinary soda-lime glass.'

formula to calculate volume thermal expansion coefficient @ http://ncalculators.com/mechanical/area-thermal-expansion-coefficient-calculator.htm

from eHow

Thermal Expansion Science Experiments for Kids

Thermal Expansion Science Experiments for Kids | eHow

Video on understanding and predicting thermal expansion. Short explanation of thermal explanation, plus example problems using thermal expansion found in Physics.