Summary
Mark and a chemist set out to make the biggest-ever 'elephant toothpaste' — a giant foaming eruption from a fast chemical reaction. It's a dramatic demonstration of a reaction that releases gas and heat.
Viewer safety
A big foaming reaction with heat and steam; clearly a 'do not try at home' demo. Made for a general YouTube audience — an occasional mild or bleeped word can slip in, so preview if your classroom bar is strict.
Our rating is a quick teacher-to-teacher guide — preview before showing.
Teaching resources
Discussion questions
Talk about it
Mixing the ingredients starts a fast reaction that makes lots of oxygen gas and heat, trapping bubbles into a huge foam.
- What signs tell you a chemical reaction is happening here?
- Where does all the foam (gas) come from?
- Why does the reaction also make the foam feel warm?
Quick work-a-long
Vocabulary: chemical reaction, gas, foam, catalyst.
Try it: Mix baking soda and vinegar in a cup. List the signs of a reaction you observe (bubbles, fizz, temperature).