We gathered some empty cups first and then decided on a few liquids, mostly based on what we had on-hand! We settled on water, soda, vinegar, hydrogen peroxide and rubbing alcohol. They were all familiar with water, soda, and vinegar, but not the rubbing alcohol and hydrogen peroxide. With the alcohol and peroxide, I explained that it’s sometimes used to kill germs and is sometimes in hand sanitizers.
We filled 5 of the cups with the liquids, then left one empty for our “control” bottle. I pointed out it’s a good idea to have a reference for our candy heart experiments. Leaving the hearts in an empty cup would remind us what they normally look like.
By this point, the kids were dying to add the conversation hearts to the bottles. We added about 3 or 4 hearts to each cup, taking a moment to watch for any reactions. Once all of the cups were filled, we observed our candy heart experiments once more.
“Look! Tiny bubbles are coming up from the hearts!” {Right away in the vinegar}
“Hey, some of the hearts are floating now!” {After an hour or so in the water}
“What’s all that extra stuff floating around in there?” {Commenting on the extra sediment that in the rubbing alcohol towards the end of the day}
“They melted the fastest!” {The hearts we put in the soda}
“These didn’t really do anything. Can I eat one?" {The bottle with just air and hearts}
| Late in the evening- our results |


