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On This Day in Science History - November 8 - Rorschach Ink BlotsWhat do you see in this picture? Tests show most people will say "A bat". Looks more like a fox face to me. Supposedly, there is no wrong answer. November 8th is Hermann Rorschach's birthday. Rorschach used this inkblot and nine other inkblots to aid with his psychiatric practice. T... |
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High-Tech Spit BallsHere's an interesting application of what I am guessing is sodium polyacrylate, the polymer used in disposable diapers, polymer gel balls and fake snow. According to a post over at OhGizmo!, Edmund Scientific is offering a version of these polymer balls for use as spit balls. Edmund Scientific sa... |
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New Periodic Table QuizWhile I was organizing element quizzes I noticed I had never offered a periodic table quiz. If you're taking a chemistry class you're practically guaranteed to be tested on this information, so I made up a quick periodic table self-test. This 10-question multiple choice quiz focuses on how well y... |
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Element QuizzesYou do a lot more problem-solving than memorizing in chemistry, but learning the element symbols and the names of the first several elements is common test fodder (because it's so useful). It's also important to know how the periodic table is set up and how you can use periodicity to predict elem... |
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This Day in Science Fiction History - Invention of the Flux CapacitorYou know how every day I've been posting a collection of factoids about significant events in science history? Of note today is an event which hasn't actually occurred (though feel free to remedy this). November 5, 1955 was the date that Doctor Emmet Lathrop Brown slipped from standing on the toi... |
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Silver Polish without PolishingI wanted to take a before/after photo of what you can expect when you use electrochemistry to polish silver, but... all I had in the house that was silver were some chains and one big silver bowl that has been black since the 1980s. I went with the bowl, which produced a picture that needs some e... |
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