Materials Required:l Insulated wire (the kind with the plastic coating)l Flashlight bulbl D-size batteryl Masking tapeThe help of one of your parents Procedure:An electrical conductor is a material through which electricity flows. You can build a device that will test different material to find out whether or not they are electrical conductors. Ask one of […]
Materials Required:l Thin cellophanel Scissors Procedure: Cut a fish shape ¾ inch wide and 2 inches long from a piece of thin cellophane. (Make sure that you use cellophane and not clear plastic. You can tell the difference by the crackling noise cellophane makes when it is crumpled.) Hold the cellophane in the palm of
Materials Required:l Knifel Cooked spaghettil Fish bowll 1 cup vinegarl 1 cup waterl Red and blue food colouringl 2 tablespoons baking sodaThe help of one of your parents Procedure: The next time you have spaghetti for dinner, ask one of your parents to cut a few strands of the cooked spaghetti into 1 to 2½-inch
Materials Required:l Coffee can with plastic lidl Hammerl Small naill Stringl Sandl Large sheet of paperThe help of one of your parents Procedure: Ask one of your parents to punch a hole in the bottom of the coffee can with a hammer and a small nail, then make 3 equally spaced holes around the top
Materials Required:l Pencill Paper Plate with ridges along the edgesl Water faucet Procedure: Push a pencil through the center of the 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 touches the
Materials Required:l 2 broomsticksl Rope2 adults Procedure: Ask 2 adults to stand several feet apart and give each of them a broomstick. Tie one end of a rope to one of the broomsticks. Weave the rope back and forth between the sticks several times. Tell the adults to try to pull the broomsticks apart—while you
Materials Required:l Small paper bag (lunch bag)l Paill Waterl StringProcedure: Set the bag into a pail filled with water. Allow the bag to fill with water, then tie it closed with a piece of string. The bag will drift in the water without any harm. Now raise the bag from the water by pulling on
Materials Required:l Cellophane packaging materialProcedure: Save the plastic wrapper from a packaged food item, such as a bag of pretzels. Try to make a rip in the cellophane by poking your fingers into it, then pulling it apart. You will find that it is very hard to start a tear, but it is easy to
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.