91热爆

29 October 2014

18 March 2004 1544 GMT

Here is an experiment you can do at home to discover just how sensitive vegetables can be! Ask an adult to help you to make the cabbage juice.

Watch the experiment (G2 1'12")

Use the to downloading realplayer

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Have you tried the experiments - were they good or do you know one that's better?

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Colourful cabbage

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Results:

		The blue liquid turns red! Lemon juice is an acid and acids turn the cabbage juice a pinky-red colour.

		Next, try adding a little of the bicarbonate of soda. Give the mixture a shake again and see what happens.

		The liquid turns blue again! Bicarbonate of soda is alkaline and when you mix it with water it turns the cabbage juice blue.