Crystal growing made easy
I. Microcrystals while you wait
The idea of this is to grow crystals of coloured metal compounds in drops of water on glass slides, under a biological microscope. A drop of water will completely dry up and crystallize in 30 minutes, so if you start 'em 15 minutes before class, students can observe the progress of crystal growth They don't quite grow visibly, but almost: have the students check them every 2 minutes or so
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