If you receive too much chocolate candy this Valentine’s Day, don’t trash it! You could use it to learn more about science.
If you drop pieces of chocolate into water, you’ll notice some pieces float, while others sink.
Some pieces float because they have more air inside, making them less dense than the water.
On the other hand, some pieces will sink because they contain things like sugar, peanuts or caramel, making them more dense than the water.