Materials Required:l Copper naill Zinc naill Steel wooll LemonProcedure: Scrub a copper nail and a zinc nail with a piece of steel wool until they are clean and shiny. Rinse the nails under the faucet. Now poke the pointed ends of the nails into the center of a fresh lemon. Space the nails about 1 […]
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
Chapter 12 My particular friend, Ward Mortimer, was one of the best men of his day at everything connected with Oriental archaeology. He had written largely upon the subject, he had lived two years in a tomb at Thebes, while he excavated in the Valley of the Kings, and finally he had created a considerable
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
Chapter11 Bishop’s Crossing is a small village lying ten miles in a south-westerly direction from Liverpool. Here in the early seventies there settled a doctor named Aloysius Lana. Nothing was known locally either of his antecedents or of the reasons which had prompted him to come to this Lancashire hamlet. Two facts only were certain
Chapter 10 And now the silent and majestic figure of my employer became an object of greater interest to me. I began to understand that strangely human look in his eyes, those deep lines upon his care-worn face. He was a man who was fighting a ceaseless battle, holding at arm’s length, from morning till
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
Chapter 9 There are many who will still bear in mind the singular circumstances which, under the heading of the Rugby Mystery, filled many columns of the daily Press in the spring of the year 1892. Coming as it did at a period of exceptional dullness, it attracted perhaps rather more attention than it deserved,