Marie and Pierre Curie observed radioactive decay as a glow in their darkened laboratory. It is NOT recommended to repeat this experiment with your students! Instead, let your students explore the law of radioactive decay with a bag of dice. This ...

Yeast is not a chemical reagent, but consists of unicellular microorganism that want to be treated nicely to do their job: Only if they have enough to eat and a comfortable ambient temperature will they produce those gas bubbles in the bread ...