One of the classes that I teach has been studying rocks. I continued their learning with a few rock experiments. I like the idea of giving young kids the tools that scientists use, so they used eye droppers and magnifying glasses. We then talked about the 3 types of rock. I smushed 3 colours of playdough together to show how some rocks are formed by pressure (and sometimes heat) to form a new rock as they could see because of the different colours.
We also looked at several types of rocks and, using the eye droppers, dropped a few drops of vinegar onto the rocks and watched, with magnifying glasses, if anything happened. (Next time, I would take students outside first and let them find 2-3 rocks of their choice to use and then give them the limestone one.) In limestone, a sedimentary rock, there are small amounts of calcium carbonate which react with the vinegar and begin to fizz. (I got the limestone from a landscaping store.)
In kindergarten, I have learned that if something fizzes, or explodes, it becomes the ‘best experiment ever’! As they begin to understand it as a chemical reaction, they develop a love of science and learning. Which is a powerful combination, that I truly believe leads to kids who change the world!