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Tomorrow I'm teaching about relative humidity and one of the instruments I want to talk about is a psychrometer, which measures relative humidity. As one who has never used a psychrometer before, the idea of trying to explain one to students was a little bit daunting. For future use (for myself and you!) I highly recommend checking out this National Park Service site. They have excellent step-by-step directions for the general public and it really helped me get it down for my lesson.
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