People say that everything is made of molecules. Are feelings made of molecules? Is sound made of molecules? – Claire, age six, Bristol, UK Thanks for the question, Claire. First things first: when ...

Nothing beats kitchen science for fun. I recently filled a glass of water to the brim. Then little by little, I added extra water from a teaspoon until I raised the level until it was clearly higher ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...