Awesome Experiments With Water ( with pictures)

Hi kids ! Today I am going to show you some interesting experiments with water. You can watch the video above or you can continue reading this article!

First experiment: FLOATING WATER

Materials needed-

1. SQUARE CARDBOARD PIECE

2. TRANSPARENT GLASS OF WATER

First take a transparent glass. Now pour some water inside it till half of the glass is filled with water.

Now take the cardboard piece and press it on the mouth of the glass very hardly. Then slowly slowly turn it upside down. Then leave your hand and you will see the surprise. The water doesn’t pour down !

Now i will tell you how it worked. As you turned the glass upside down the air pressure pushed the cardboard piece, not allowing the water to pour down.

Second experiment: COWARD PEPPER

Materials needed-

1. Plate

2. soap

3. peper

4. water

First take a plate and fill it with water.

Now sprinkle some pepper in the plate filled with water.

Now take a soap or sanitizer and apply one drop of it in your finger. And touch the plate with pepper. Then see what happens! The pepper moves away from the soap.

So whats happening here? Is the pepper reacting to the dish soap? Well no, whats actually happening is by adding soap to the water, we break down the surface tension of the water. This is one of the reasons why soap makes a good cleaner. When soap is added, the surface tension is reduced, and the water wants to spread out flat (water normally bulges up slightly, like when you overfill a glass of water, or if you have a single drop of water sitting proud on a table top). As it spreads out it flattens on the dish and carries any pepper that’s floating on the surface with it, away from the source of the soap and to the edge of the water. You may also find that now the surface tension of the water is lower some pepper grains sink to the bottom of the water.

When cleaning dirty dishes, detergents help break down the grease because it acts as an emulsifier (this means it allows the oil and water to mix), so the oily leftovers on the plate can be rinsed off easier. As explained above and in our demonstration, soap also lowers the water surface tension, this means rather then the water molecules sticking together tightly because of their strong attraction to one another, the water is now able to mix with the grease better, and thus help to clean off the grime.

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