Does water behave the same on all surface?
The surface of a material controls lots of properties of a materials such as what it looks like, what it feels like and also how water (and other liquids) behave on it – just think about your raincoat, you wouldn’t want it to soak the water up would you?
This activity looks at how different solids change the way a water droplet behaves on the surface of a materials (in other words how a liquid wets the surface).We have prepared a worksheet (which can be downloaded here). We haven’t yet made a specific video for this activity but the section between ~7min20s and 14min30s on the following video is relevant: https://youtu.be/6S-M9ZyeqD0
Ideas for surfaces to look at
Try putting a water droplet on a waxy surface and a glass to compare them. What’s the difference between the droplets?
Try putting a water droplet on a cabbage leaf or a holly leaf. Each leaf is waxy so what is the different about the surfaces ?