Heat causes objects to become bigger

Most things get a little bigger when they are heated, though you probably don't notice it. If you place a glass in a pan of water and heat the water slowly, all the surfaces of the glass would expand evenly, making the glass a little bigger. But if you pour boiling water into a cold glass, the inner surface of the glass gets the heat first and expands quicker than the outside. The pressure from this expanded surface is so strong that the glass breaks.

Most things get a little bigger when they are heated, though you probably don't notice it. If you place a glass in a pan of water and heat the water slowly, all the surfaces of the glass would expand evenly, making the glass a little bigger. But if you pour boiling water into a cold glass, the inner surface of the glass gets the heat first and expands quicker than the outside. The pressure from this expanded surface is so strong that the glass breaks.

bigsiteofamazingfacts.com; wiki.answers.com; newton.dep.anl.gov

X