Thermometer Challenge Glossary
Change of state - Matter changes state when it switches from one physical form to another. A change of state occurs when the atoms that make up the matter either gain or lose enough heat energy to alter their physical form.
Mercury - The element mercury is liquid when it is in the temperature range of -38.9°C to 356.7°C. As a liquid, mercury expands as it gets warmer. Its expansion rate is linear and can be accurately calibrated.
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Originally published: Monday, 18th September 2006
Last updated on: Saturday, 21st July 2007
- Body text - Creative-Commons: The Open University
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