Baking-Soda Balloon Inflation
Balloon inflates without anyone blowing.
Teaching & key ideas
What you do: Combine reactants so produced gas fills balloon.
What students see: Balloon inflates without anyone blowing.
Why it works: Acid-base reaction makes carbon dioxide gas.
Question to ask: What new thing is filling the balloon?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: What new thing is filling the balloon?