Fun Science Activities

Water drop on a coin   We started off  by observing a drop of water on a coin and how it holds the shape of a dome. It holds the shape unless the drop is bigger than the coin. We tried adding few more drops to this drop. And this is due to cohesion and surface tension properties of water. Cohesion is the attraction of one molecule to the other molecule. Surface tension is the cohesion between water molecules. There are few science experiments that you can do to show the surface tension property of the water. 1. Allow a steady flow of water. 2. Hold one finger under and observe that water flow becomes like water droplets due to surface tension in the steady flowing water. The  second experiment would be 1. Take a bowl of water . 2. Take  materials such as hair clip, safety pins, coins . 3. Drop them into the bowl. 4. Observe that they all sink to the bottom. Pin and the coin sank to the bottom Now , take a small sheet of paper...

Whether you are a small kid or an adult, I am sure all of us enjoy playing with bubbles. The joy of chasing  the bubbles,  to catch it before it bursts is immense. Don't you agree with me? . So, that is what we did this week learning about bubbles. We had loads of fun. First, we discussed about bubbles related to the science behind 1. what is a bubble? 2. How the molecules are arranged to hold its shape? 3. How to keep them for long?. A soap bubble is an extremely thin film of soapy water enclosing air that forms a hollow sphere. To understand how soap bubbles are holding the shape when water is mixed with soap we need to know that soap molecule has a hydrophilic head and a hydrophobic tail. The diagram  shows the arrangement of molecules in a bubble. We also did the same with spoons and bottle caps. White spoons (spoon head- hydrophilic and spoon handle - hydrophobic) are the soap molecules and bottle caps are the water trapped in between them. Whe...