Why do apples float and pears sink?

Answered by Jeremy Urbaniak

Well, let me tell you, I’ve had my fair share of bobbing for apples in my life, and I’ve always wondered why some apples float while others sink. It turns out that the answer lies in the way gas is distributed inside the fruit.

You see, apples and pears have tiny air pockets within their flesh, which contain gases such as carbon dioxide. These gases are produced during the fruit’s maturation process. The distribution of these air pockets determines whether the fruit will float or sink in water.

In apples, the air pockets are more spread out throughout the fruit, creating a lower overall density. This lower density allows the apple to float in water. On the other hand, pears have their air pockets concentrated towards the core, making their overall density higher. As a result, pears tend to sink when placed in water.

The variation in gas distribution can also be influenced by the type of apple or pear. Different apple varieties, such as Granny Smith or Red Delicious, may have slightly different gas distributions, leading to variations in their buoyancy.

It’s fascinating to think about how something as simple as the distribution of gas pockets can determine whether an apple floats or sinks. Next time you’re bobbing for apples, you can impress your friends with this fun fact! Just remember, not all fruits will float, so you might want to stick with apples if you’re planning on winning the game. Happy bobbing!