Experiment 2: Slime!

Making Slime!The Experiment

The Science

The glue is a liquid polymer (polyvinyl acetate) adding the Sodium Tetraborate causes the PVA molecules to link together forming one large rubbery polymer.

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.

Welcome!

This is, hopefully, the first in a series weekly of science experiments undertaken with my daughter Phoebe.  We're going to start with some of the experiments in the horrible science kit and throw in a few others if I find anything interesting.