January 20

A Trip through the Forest

After I demonstrated that water (H2o) drops like to stick (bond) together, PreK scientists drew a path through a forest, and slid their finished drawings inside page protectors. They used pipettes to squeeze drops of water onto the page protectors, and then turned the paper to guide the drops along the paths they drew. Focus and use eye-hand coordination was required for success. This was also an interesting way to investigate friction. Tiny drops did not move, but large drops were difficult to control. These young physicists also placed multiple drops of water on their page protectors, and as they moved the paper, they watched the drops merge into a single drop. In addition, they were experimenting with adhesion which is the tendency of water molecules to be attracted, or ”stick”, to other substances. This is a fun activity to do at home!

 

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