Experiment 1: Make a Volcano!

Milk Make a Volcano

Here, Phoebe explains what we're going to do.

How To Make a Volcano

1. Take one plastic volcano.
2. Fill approx 2/3 full with vinegar
3. Add a teaspoon of Sodium Hydrogen Carbonate
4. Quickly replace the lid
5. Enjoy

Memorable Quotes

While spraying the ground with the hose to clean up the foam, she excitedly exclaimed "Look!  I'm washing science off the patio!"

The Science

The full explanation can be found here, but the main thing is this: the baking soda (sodium hydrogen carbonate) and vinegar (acetic acid) react to produce carbon dioxide gas.  This escapes from the solution as bubbles, pressurising the volcano and spraying out of the hole in the top.