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• n  a change from one state (solid or liquid or gas) to another without a change in chemical composition

• phase change
• state change
• physical change

News & Articles

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• Supercooled water transforms into new form of liquid
  Researchers have identified that water, when chilled to a very low temperature, transforms into a new form of liquid. Through a simulation performed in "supercooled" water, the research team confirmed a "liquid-liquid" phase transition at 207 Kelvins, or 87 degrees below zero on the Fahrenheit scale.
  July 10, 2013 - Science Daily