Bubbly Volcano Song: How CO₂ Pushes Foam

What wakes inside our paper mountain? With a grown-up, set the tray below An open plastic bottle fits the cone Pour in vinegar bright with color Add a little dish soap too Tip in baking soda; now they react Hear the hiss; quick bubbles multiply Baking soda and vinegar make gas Carbon dioxide, CO₂ That gas pushes foam up past the rim Then it streams down the paper cone Dish soap catches every bubble And holds the gas inside its foamy net But the soap makes no CO₂ Gas-filled foam climbs over the rim Colored rivers run down the cone Baking soda and vinegar make gas Carbon dioxide, CO₂ That gas pushes foam up past the rim Then it streams down the paper cone Those bubbles show the gas just made It pushed the foam out of the bottle It looks like lava, but it's only suds Baking soda and vinegar made CO₂ That gas pushed the foam outside