Floating Satsuma

Peel a satsuma and watch it sink without its water wings

Ingredients and equipment that you will need

Satsuma
Glass of water

Method and further information

Drop the satsuma into the glass of water and it will float.
Now peel the satsuma and drop it in again and it sinks.
The peel holds a layer of air round the satsuma. (That’s why they peel easily). This air acts as water wings, just like those that help you to swim.

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.