Science Experiments

Fizzy Yeast

Sun, 30th Mar 2008

Listen Now    Download as mp3 Part 1,2 from the show Tuberculosis and Magnetic Bacteria

What you Need

Some yeast

1 tsp yeast


3-4 tsp of sugar

A balloon

A balloon

A bottle

A 500ml lemonade bottle

Warm water

Luke warm water



What to do

Add the the yeast and the sugar to the lemonade bottle
Fill the bottle 1/3 - 1/2 full of warm water
Shake the mixture thoroughly
Stretch the balloon over the top of the bottle
Keep the mixture warm for 30mins to a hour or so.

What may happen

You should find that the mixture becomes frothy, and the balloon inflates.
If you leave the mixture for a couple of hours and then shake it, you should find that it froths up like a fizzy drink.


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