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      Question

      What is the name of the process by which a liquid

      changes into gas at all temperatures?  
      A Boiling Correct Answer Incorrect Answer
      B Melting Correct Answer Incorrect Answer
      C Evaporation Correct Answer Incorrect Answer
      D Condensation Correct Answer Incorrect Answer

      Solution

      Evaporation is the process where molecules at the surface of a liquid escape into gas phase.   It occurs at all temperatures, unlike boiling which happens at a fixed temperature.   It causes cooling, like sweat evaporating from skin.   Factors affecting it include temperature, surface area, and wind.

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