121 Science Experiments

Materials Required:l Raw eggl Hard-boiled egg Procedure:Can you tell the difference between a raw egg and a hard-boiled egg? They look and feel the same, but here is an easy trick. Spin a raw egg on a hard surface, such as a counter or tabletop. (Don’t let it fall off the table or you’ll have […]

Materials Required:l 4 small plastic bowlsl Strong plastic tapel 16 marblesl 3-foot, or longer, boardl Several books Procedure: Tape 2 small plastic bowls together back to back, forming a wheel. Make another wheel with 2 more identical bowls. Tape 4 marbles to the center of each side of one wheel. Then tape 4 marbles to

Materials Required:l Push-pull cap from dishwashing liquidl Baseball batl Clayl Ball bearing or small marble Procedure:You learned about a bat’s center of percussion in the last experiment. Here is another method to locate that spot on your bat. Pull out the center piece of the push-pull cap and attach it to the end of your

Materials Required:l Wooden matchl Large safety pinProcedure: Break the striking head off the wooden match and discard it. Open the safety pin and push its point through the center of the match. Close the pin. Move the match around the metal several times so that it rotates easily. Now rotate the match until it is

Materials Required:l Nylon rope, or nylon clothesline, 6 to 8 feet longl Dacron, polyester, or dacron/polyester rope, 6 to 8 feet longl Waterl 2 big rocksThe help of one of your parents Procedure: Wet both pieces of rope with water from a garden hose or in a sink. Ask one of your parents to tie

Materials Required:l Candlel Aluminium pie tinl Coinl Index cardl MatchesThe help of one of your parents Procedure: Set the candle on the aluminium pie tin and place the tin in the sink. Rest the coin in the center of the index card. Ask one of your parents to light the candle and move the card

Materials Required:l Heavy-duty rubber band, at least ¼ inch wide Procedure: Hold the rubber band between your two hands and stretch it tightly. Gently place it against your cheek. The rubber band feels warm. Now release the tension in the rubber band, and once again hold it to your face. This time it is cool.

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