Preserving Food Materials Required: Small, plastic freezer or storage bags Carrot Lettuce Celery Use of a freezer Pencil and paper Food is preserved to make it stay fresh for longer periods. Milk stays fresh much longer, if it is stored in a refrigerator rather than being kept on the kitchen table. Some of the food items can be preserved by freezing. Look in your refrigerator’s freezer and have a look at...

Escaping Gases Materials Required: A balloon A bottle of carbonated soda Soda contains Carbon Dioxide, a colorless gas that is exhaled by human beings and animals. This gas is also created, when things containing a high carbon content are burnt, like charcoal, wood and coal. This carbon dioxide is contained in carbonated soft drinks, which adds the fizz to these drinks. With the cap placed on the soda bottles, the carbon...

Degree of Comfort   Materials Required: A thermometer Paper and pencil An adult, for safety around There are hot and cold areas in your home because of temperature difference. Even with air conditioning in the summer and heat during winters, the range differs. That spot will not be as comfortable, as the rest of the house. Some section may be agreeable at a particular time of the day, while others prove...

Popping in Air Materials Required: A single page of a newspaper Let us make a “paper pistol.” It can be fun. The “pistol” can be made by folding a single sheet of a newspaper, as shown in the illustration. Hold it from one corner and swing it rapidly in the air. A part of the paper comes out with a cracking noise, as if a pistol is being fired. Fold the...

Perpetual Motion Materials Required: A bowl A Table Tennis ball Drop a Table Tennis ball in a soup bowl. With your index finger start rolling the ball in a circular motion around the rim of the bowl. Onlookers would obviously expect the ball to stop rolling and come to rest at the bottom of the soup bowl. Surprisingly the ball will continue in its circular motion along the rim of the...

How to Merge Streams of Water Materials Required: A plastic bottle A screwdriver or poker Some water Would you like to do something that has a scientific reason and conclusion to it, but seems to be magical?  You can make three streams of water blend like magic into a single flow and then make them go their separate ways, if you first pinch the three together and then brush a finger...

How to Float a Metal Coin Materials Required: A 1-yen coin (Japanese currency) A bowl filled with water A paper clip Liquid detergent The 25-paisa coin has aluminium as an alloy. It is so light, that it can be made to float in water. Now fill a bowl with water. Once the water is still, balance a yen on a paper clip and carefully lower the yen, to the surface of...

A Turbulent Card Materials Required: A magazine Playing Cards Flatten out a magazine on the floor. Hand over six playing cards to a friend. Ask him to drop each card from a few feet height, so that it lands on the magazine. Show him how to hold a card, as shown in the illustration, but don’t tell him that the card has to be held vertically, before it is dropped. 1.If...