Fall is a fun time to play with apples and go apple picking. If you have a few extra apples laying around, here’s a great investigation for the tiny tots in your home to investigate whether apples sink or float when placed in water.
Here’s what you need to get started:
- apples of different varieties (we used, Fuji, Granny Smith and Red Delicious)
- Bin with water
- Knife (to cut apples, for adult use only)
Have your superheroes hold the apples in their hands and predict what will happen when it is placed in water. We tried 3 different types of apples, making a hypothesis (prediction) before placing each one in the water.
First the Granny Smith apple
Then the Red Delicious and Fuji apples
All three apples floated. There was no difference between the 3 varieties. But why did they float? Apples have a lot of small air pockets inside that cause them to float in water.
But what about the individual apple parts? Do all the apple parts float? We decided to find out by cutting an apple open and testing each part in a cup of water.
What we noticed was the apple pieces and the peel still floated in water.
But, the stem and the seeds did not float.
This was a great investigation on floating and sinking using apples! And while you have a bunch of apple parts lying around, try exploring your 5 senses using apples. Or let the little ones “bob” for apples!
For more Apple Science Activities, try:
The Science behind the Activity:
Apples contain quite a bit of air inside them which causes the overall density of the apple to be less than that of water, so it floats. By testing the individual parts, we can see that not all parts of the apple float in water but when all the parts are put together they do.