Did you know lemons float on water? Do you know how to make a lemon sink?
We tried pushing one down to make it sink, but it just popped back up again.
What about if we chop it into smaller pieces?
I expected these small bits to sink, as without its waterproof skin water can get into the lemon pulp and add to its weight, but our segments still floated.
We then removed the skin and found the bits of lemon sank? Why do you think this is?
If you look at the inside of the lemon skin you can see it is very thick and porous, this means it contains lots of air which makes it float.
Which other fruits do you think would float and which would sink?
Can you predict which fruits will sink and which float and test them?
Use your lemon rind to make a fruity boat.