Materials Required:l Tapel Stringl Coinl DeskProcedure: Tape a piece of string to one side of a coin. Tie the free end of the string to the handle on an opened desk drawer. Keeping the string straight, pull the coin back until it touches the front of the desk. Then release it, letting it swing away. […]
Materials Required:l Small bar of soap, not the kind that floatsl Glass jar with lidl Gluel Paperl Waterl Pencil Procedure: The tiny bars of soap from hotels or airplanes are excellent for this experiment, but if you don’t have any, slice a piece of regular soap into several chunks that will cover the bottom of
Materials Required:l A friendl Broom Procedure:Challenge your friend with this experiment—you’ll always win! Ask your pal to hold both hands straight out and grasp the broom. Place one of your hands in the center of the broom, with your arm bent at the elbow, grasping it with a slight downward tug. Tell your friend that
Materials Required:l Wire clothes hangerl Coin Procedure: In one hand, hold a wire clothes hanger by the hook. With your other hand, pull straight down on the bottom wire at the middle. Bend the wire until the hanger has stretched lengthwise and an angle has formed. Slip this newly-formed bottom angle over your index finger
Materials Required:l 2 antacid tabletsl Empty plastic bottle, such as a 6-inch-tall shampoo bottlel Waterl Pan Procedure: Break apart two antacid tablets and put the pieces in the bottle. Now fill the bottle about ¼ full with water. Rest the bottle on its side in a pan of water. You will see the bottle-boat chug
Materials Required:l Empty food can, such as a soup canl Can openerl Scissorsl Cardboardl Paill Waterl Drinking glassThe help of one of your parents Procedure: Ask one of your parents to cut away the bottom of an empty food can with a can opener so that both ends are open. Cut a piece of cardboard
Materials Required:l Empty mayonnaise jarl Uncooked ricel Knife with blunt, wide blade, such as a cake knife Procedure: Fill the empty mayonnaise jar with uncooked rice and pack it down firmly. Add more rice until it’s even with the top of the jar. Poke the blunt knife into the rice several times to a depth
Materials Required:l Sawl Boardl Small glass bottle with a protruding lipl Metal trash canl Waterl Corkl HammerThe help of one of your parents Procedure: Ask one of your parents to use the saw to cut a notch in a long, flat board so that the bottle can be suspended from it by resting the glass
Materials Required:l Sheet of typing paperl Rubber bandl Book Procedure: Roll a single sheet of typing paper into a tube and slip a rubber band around it. Stand the tube 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
Materials Required:l A weighing scale Procedure:Here’s an easy way to lose several kilograms instantly. Stand on the bathroom scale and raise your arms high above your head. Read the dial and note how many kilograms you weigh. Lower your arms rapidly to your sides. You are suddenly many kilograms lighter. Oops! A few seconds later,
Materials Required:l A thunder and lightning storm Procedure:Can you tell how far away a storm is? Here is a simple way to find out. The next time a big thunderstorm occurs, watch for the lightning. As soon as you see the flash in the sky, start counting, “thundercracker 1, thundercracker 2, thundercracker 3,” and so
Materials Required:l Fish tankl Waterl Blue food colouringl 1 cup vegetable oill Stirrer Procedure: Fill a fish tank or other large, clear container about half full with water, and add some food colouring until the water turns to a deep shade of blue. Then pour the oil on top. Slowly stir the water. The oil
Materials Required:l Saucepanl Waterl Frying panl Ice cubesThe help of one of your parentsProcedure: Fill a saucepan about ¼ full with water, and ask one of your parents to boil it over high heat. Fill a frying pan with ice cubes, then give it to your parent to hold several inches above the steam escaping
Materials Required:l Glassl Waterl Ice cubel Stringl SaltProcedure: 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 several inches long. Set the loop on top of the ice cube. Sprinkle some salt over the top of the cube
Materials Required:l 2 thermometers, 1, or both, with an exposed bulbl Clothl Threadl Waterl Electric fan Procedure: Make sure the two thermometers give identical readings. Wrap a piece of lightweight cloth once around one of the exposed thermometer bulbs, and tie it in place with thread. Wet the cloth with water, then hold both thermometers,