Here’s our review of the 15min STEM activity ‘how many drops of water can you fit on a penny?’
We began by collecting up our resources and found it was worth taking some time to practise using a pipette before we began the experiment. Placing just one drop of water on the penny at a time was more of a challenge than expected!
Our next step was to begin the count. With each drop, we were amazed to see the water molecules joining together. By drop number 20, the water was still clinging on to the penny in an impressive display of surface tension.
After mopping up the water with our paper towel, we had another go, this time with the other side of the coin. We were surprised by the difference in water droplets that each side of the coin could hold. We’ll let you investigate this for yourself and see what you find…
Download our our 15min STEM activity ‘how many drops of water can a penny hold‘ resource here.