How to Make a Model Volcano Blow Up
- 1). Fill the plastic bottle about 3/4 of the way full with white vinegar.
- 2). Spoon approximately 2 tablespoons of baking soda into the center of a paper towel.
- 3). Fold the paper towel into a makeshift envelope around the baking soda.
- 4). Anchor the plastic bottle full of vinegar into the center, or caldera, of the model volcano.
- 5). Drop the paper towel with baking soda carefully into the opened bottle. The paper towel works as a sort of time-release coating that gives you time to back away and observe as the baking soda and vinegar react in a foaming explosion.