In this science experiment we will suspend water using a screen. Logic tells you when its turned upside down the water will come right through the screen. But it doesn't! Get some plastic mesh from the fruit or vegetable section of the store or some wire screen door mesh. You'll astonish your buddies with this awesome experiment that defies gravity and uncovers the mystery of surface tension. So lets get to it and do the Water Screen Experiment
Materials - Plastic mesh bag used for produce at the grocery store or wire screen door mesh - Glass bottle - Rubber band - Index card - Water
Watch Video: Water Screen Experiment
Process Water Screen Experiment
1.Cut a piece of plastic mesh or wire screen large enough to cover the mouth of the glass bottle with some extra room.
2. Place the mesh over the bottle mouth and secure it with the rubber band.
3. Pour water through the screen and fill the bottle. This will illustrate to everyone that water really does go right through it. Fill it all the way up to the top.
4. Take the index card and cover the screen. Now turn the bottle upside down with the index card still covering the screen. Once upside down, slowly remove the index card. Magically, the water does not come pouring out through the screen.
5. When your ready to prove that there was no trick or secret substance covering the screen, while still holding the bottle upside down, tip the bottle to one side or the other. Watch peoples faces as the water comes out!
The Science Behind Water Screen Experiment: When you submerge a screen into water and then pull it out, you will see that water fills the screen holes. This is due to a force called cohesion. Cohesion is the attraction of molecules that are the same to each other. Surface tension allows to water molecules to form a membrane. As a result water stays in the bottle even after the card has been removed. The water molecules are bound together to form a thin membrane between the screen openings. When you tip the bottle it breaks the surface tension and the water comes wizzing out. Now grab your friends and do the Water Screen Experiment!