Hearts Bobbing

For those who missed the Hearts Bobbing instructions on ParentMap and Parenting.com, here is the full experiment.

To make conversation hearts bob, drop them in a bottle of club soda. As the carbon dioxide in the soda forms bubbles on the hearts, the hearts bob to the surface, only to sink again when the bubbles come off. If you put the lid back on the bottle, the hearts will bob for a few minutes. Once they reach the top and start to stay there, gently shake or tap the bottle to knock the bubbles off and put the hearts back in motion. You can also do this experiment by pouring the soda into a cup and adding the hearts, or by using clear soda pop instead of club soda.

A version of this photo appeared in the book Candy Experiments,
and is copyrighted by Andrews McMeel Publishing.

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