Relative Humidity, Dew Point and Cloud Formation Lab



Looking for a hands-on activity to reinforce the concepts of relative humidity, dew point and cloud formation? Here you go!


In this lab, students study how rising air becomes saturated to form clouds. They go outside and use a sling psychrometer to measure the wet-bulb and dry-bulb temperatures. They use the Earth Science Reference Tables to determine dew point temperatures and relative humidity.


This lab is intended to take between 45 – 60 minutes and requires the following materials:

  • A pencil
  • ESRT
  • A sling psychrometer


This resource includes an answer key as well.


Grade Levels: 8th – 12th
Total Pages: 12
Teaching Duration: 45 Minutes


If you have any questions, please do not hesitate to ask.
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