Sahil

Material Required: A packet of unsweetenedcrackers Procedure: Place an unsweetened cracker in your mouth. Chew it thoroughly, but don’t swallow it. Continue to chew without swallowing for several minutes. Does the cracker now taste sweet? This is what happens: The moisture in your mouth is called saliva which contains chemicals that start to break down […]

Materials Required: Large can, such as acoffee or juice can Hammer Nail Water in a bowl Procedure: Ask one of your parents to punch 5 holes into a large can, using a hammer and a nail. The holes should be placed on the side of the can, near the bottom, and spaced ¼ inch apart.

Materials Required: Cork Slender tube Lac or grease Glass bottle Large bowl A piece of cloth Procedure: Drill a hole in the cork and insert the slender tube through the hole. Then fix the cork along with the tube tightly on the mouth of the bottle. Lac or grease can be used for making the

Materials Required: 1 tablespoonful of dried hot peppers ¼ cup of hot tap water Cotton swab Procedure: Mix the hot peppers in the hot tap water. Let the mixture soak for about twenty minutes. Next, dip a cotton swab in the water. Then shake off any excess water. Touch the tip of the swab to

Materials Required: Glass of water 3 test tubes Grease Procedure: Take three test tubes and put them in a glass and half fill up with water. Now observe the water level carefully. It is highest at the sides and gets gradually concave in the middle! This curved level of water is called meniscus and the

Materials Required: Sheet of typing paper Rubber band Book Procedure: Roll a single sheet oftyping paper into a tubeand slip a rubber band around it. Let the tube stand on end on a flat surface. Carefully place a book on top of the tube and you will see that the paper supports the weight of

Materials Required: Candle Match box 1 teaspoonful of baking soda Glass (not plastic) measuring cup,marked for millilitres Vinegar Procedure: Set a candle on a safe place. Then ask one of your parents to light the wick. While the candle is burning, place the baking soda into the glass measuring cup. Look at the markings and

Materials Required: Saucepan Tap water Glass Procedure: Fill a saucepan with tap water. Ask one of your parents to boil the water gently for a few minutes. Then leave the pan undisturbed with its cover on until the water is cool. Now pour some of the water into a glass and drink it. Does it

Materials Required: Paper straw Scissors Drinking glass Water Procedure: Slit a paper straw across, about 1/3 from one end, making sure you do not slit it all the way through. Bend the straw back like a hinge and insert the shorter end into a drinking glass. Fill up the glass with water until the level

Materials Required: Scale and pencil An old postcard Scissors Procedure: Fold the postcard from the centre so that it may get divided into two parts. Now cut the square from the fold as shown in the picture. Make the lines with the pencil on the postcard as shown in the said picture. Cut the above

Materials Required: A can with plastic lid Hammer Small nail String Sand Large sheet of paper Procedure: Ask one of your parents to punch a hole in the bottom of the can with a hammer and a small nail; then make 3 equally spaced holes around the top edge of the can. Tie a piece

Materials Required: Metal can Nail Hammer Round balloon SoapDon’t forget to take the helpof one of your parents. Procedure: Ask one of your parents to make a small hole near the bottom of a metal can by tapping the tip of a nail into the metal can with a hammer. Inflate a round balloon until

Materials Required: Pencil Paper plate with ridgesalong the edges Water faucet Procedure: Push a pencil through the centre of the paper plate, wriggling the pencil back and forth to make the hole loose. Turn on the tap water to produce a steady stream. Hold the pencil so that one edge of the plate may touch

Materials Required: Empty glass bottle Vessel Water Procedure: Take an empty glass bottle and remove its cap. Hold it upside down and immerse it into a vessel filled with water. Water enters the bottle and rises up only a certain point. Now, immerse the bottle deeper in the water. The level of water inside the

Materials Required: Glass Water Ice cube String Salt Procedure: Fill a glass with water and place an ice cube on the surface. Tie a loop, about 1 inch in diameter, in a piece of string. Set the loop on topof the ice cube. Sprinkle some salt over the top of the cube where the loop