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.
ilovebacteria.com explains science to people who do not necessarily have a scientific background. You'll find a selection of DIY experiments like egg osmosis, and strange facts like the ever popular why does asparagus make your wee smell? And don't forget to meet the microbes.
Journal of Visualized Experiments is an online research journal for publishing visualized (video-based) biological experiments
Is this guy an awesome teacher or just crazy? Or maybe it goes hand in hand. Think back to the days of high school and college science classes. For most people, it probably wasn't chalkboards full of endless physics equations that got them interested in the sciences, but rather the crazy, cooky and awe-inspiring professors who do dramatic and unique demonstrations to get students interested. What makes a good teacher or professor? Is this teacher really reckless or is it a legit demonstration that benefits students?
Unsafe-science-experiments-you-did-in-class-Friday: an advisory on dangerous chemistry experiments (they mention Nitrogen Triiodide, Chromate Volcanos, Whoosh Bottles, and Potassium Chlorate and Sugar), unwise microwave oven experiments, and, of course, thermite (and a great thermite video). I am amazed anyone survives high school, what other dubious but educational experiments did you do? Note: all pages are science education sites. Read the warnings. The awesome Chemistry Comes Alive site mentioned prev.