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    In this activity, students measure the relative humidity in their classroom and in a sheltered playground location and relate the relative humidity and temperature in the classroom to thermal comfort levels.

    By the end of this activity, students should be able to:

    • explain the meaning of the terms relative humidity and dewpoint
    • describe the evaporative cooling effect that lies behind the wet bulb/dry bulb temperature differences
    • relate evaporative cooling present in this setting to the latent heat of vaporisation of water
    • give a simple explanation of the role relative humidity and temperature play in establishing satisfactory thermal comfort levels in classrooms.

    Download the Word file (see link below) for:

    • introduction/background notes
    • what you need
    • what to do
    • student handouts.
      Published 29 April 2014 Referencing Hub articles