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Freaky hand

    Freaky Hand

    Freaky Hand demonstrates that gases expand. Stand back in case it pops!

    Ingredients and equipment that you will need

    Bicarbonate of soda
    Polythene glove
    Large jar

    Method and further information

    Put a centimetre of vinegar in the jar. Put a teaspoonful of bicarbonate of soda in one finger of the glove.

    Fix the glove over the jar. It needs to be a tight fit and you might need a wider jar.

    Lift the glove up to tip the bicarbonate of soda into the jar and the carbon dioxide produced will puff the glove out.

    Be careful – you should ask an adult to help you with these experiments. Do your experiments in old yoghurt pots, jam jars or bottle tops. Don’t use cups or glasses in case someone thinks it’s a drink.