A jar, warm water and a dish of ice show evaporation, condensation and precipitation in minutes, with key vocabulary and questions for KS2 learners.

Most primary science fair projects stumble on the same few points — untestable questions, unfair comparisons and cluttered boards. Here's how to spot and fix each one.

Why autumn leaves turn from green to gold and red, explained through chlorophyll, carotenoids and anthocyanins — plus a simple chromatography experiment you can run at home.