Chemical Reactions. Four minutes of the best moments of stuff burning, breaking, freezing, exploding, melting, and generally reacting in interesting ways. [more inside]
posted by quin on Dec 30, 2011 - 15 comments

You can see that things gradually become more terrifying : Five of the six alkali metals and their reactions to air and water. Learn more at the Periodic Table Of Videos. Lithium, Sodium, Potassium, Rubidium, Cesium (Caesium), and the elusive Francium.
posted by The Whelk on Nov 18, 2009 - 29 comments

"UNTIL you experiment with chlorine, you have missed some of the biggest thrills your home laboratory can give you." Sound like fun? Bet you'll want to set up your own home chemistry lab and try it out. But don't stop there - the wonders of hydrogen and mercury await! Make a gas that gives you the giggles, then blow stuff up for more guffaws. And that's just part of only one section of Modern Mechanix - "Yesterday's Tomorrow, Today!"
posted by hangashore on Apr 24, 2007 - 13 comments

PhET - Physics Education Technology offers this astoundingly large library of online physics simulations. Play orbital billiards. Land on a cheesy moon. Experiment with sound. Or try more advanced quantum physics simulators. Still bored? Try the "cutting edge" catagory. Here's the complete index. (Warnings: Frames, Flash, Javascript, Java applets, graphics, sound, quantum timesuck.)
posted by loquacious on Feb 3, 2007 - 7 comments