Answer:When you combine vinegar and baking powder, a chemical reaction happens. Here's what changes:What You Observe (Physical Changes):Fizzing or Bubbling – You'll see bubbles or foam form quickly.Gas Released – A gas (carbon dioxide) is released, which causes the fizzing.Temperature Change – The mixture may feel a little cooler during the reaction.What Actually Happens (Chemical Changes):Baking powder contains baking soda (sodium bicarbonate) and an acid (usually cream of tartar).Vinegar is a liquid acid (acetic acid).When they mix, they react to form carbon dioxide gas, water, and a new substance (a salt).The Reaction Looks Like:Sodium bicarbonate (baking soda) + Acetic acid (vinegar) → Carbon dioxide + Water + Sodium acetate