Materials: vinegar, baking soda, empty fish tank or large glass bowl, bubble mix and maker,
clean dry hair & comb
More fun with CO2 here. Mix a bunch of vinegar and baking soda at the bottom of your empty fish tank. This will produce a large amount of CO2 which will fill the bottom of the tank.
Now make some bubbles and direct them towards your tank. Some of them will "hit" that CO2 layer and stop floating on top of the CO2. This affords you the chance to study a bubble that isn't moving around.
If you charge up a comb by combing your hair vigorously for a bit you can then bring the charged comb near one of your floating bubbles. You should notice that the bubbles are attracted to the charged comb (much like a thin stream of water will be). You should also notice if you look carefully that the bubble will change its shape from the normal sphere (below, left hand bubble) into more of an egg shape (below, right hand bubble).
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