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