Does Orange Sink or Float?

Does orange sink or float? That was the big question for our recent experiment (not so recent-lah, it was four months ago, hee forgive us). I asked the girls their guesses whether the orange sink or float. All of them answered that the orange will sink. The answer is not so simple as it is. So we decided to find out the answer. 

What we need:

1. An orange

2. A bucket of water

What to do:

 1. Fill a bucket with water. 

 2. Place an orange in it.

 3. Observe whether the orange sinks or floats.

 4. Then take the orange out and peel all of the rind away.

5. Try the experiment again, and see if the orange behaves any differently! 

Results:

The unpeeled orange sink, while the peeled orange floats.

What really happened?

It is because the rind contains little picket of air, which essentially keep the thing afloat- but when they're gone, the entire piece of fruit simply submerges! Iris simply similarized the orange as a person who swims with and without the life float. Brilliant simple comparison!