What gives popcorn its pop?
A simple experiment involving inversion of a conical flask over burning a candle in a dissection tray with some water can be a stimulus for open-ended, really really fun, very very challenging -- to both students and teachers alike -- problem, covering some fundamental high school chemistry.
Who says sugar is bad for children?! It's especially not bad in a chemistry classroom where it can be used to create flares and to bring chemistry alive! This is the 6th Beauties vs. Brawns challenge.
When people think of modelling, they think of catwalks and skinny models, mostly. We do a lot of that in Science too...modelling that is, not the catwalks and skinny models!
Challenge number 5. A dramatic decomposition reaction!
When crystals in the Chemistry lab interact, it's not always crystal clear what is happening...unless you know Chemistry!