The students will construct and use a sling psychrometerto determine relative humidity. Safety goggles are required for this activityin my classroom while the psychrometers are being constructed and used. Students will take measurements of the temperature on each of the two thermometers,determine the difference between the two readings, and use a table to determinerelative humidity. Students may needto review how to read a thermometer. The students should find two thermometersthat have the same room temperature reading before constructing their slingpsychrometer.
Safety is probably the biggest concern with students.
I requiresafety goggles for the construction and use of sling psychrometers. Theirsling psychrometer should have to pass instructor approval before theytry it out. Students need to be reminded to record the changes in temperatureafter the psychrometer has been spun. Having the class decide on ten ortwenty spins might be a good idea. Two thermometers mounted on metal backs.