121 Science Experiments

Materials Required:l Round balloonl Wide-tip felt marker Procedure: Inflate a round balloon partially full with air. Pinch the neck closed with your thumb and forefinger, but do not tie it closed. With a wide-tip felt marker, make several specks all over the surface of the rubber. Let them dry. Now blow more air into the […]

Materials Required:l String, about 40 inches longl Tapel Flashlightl A dark room Procedure: Tape one end of the string to a flashlight. Go into the room you have chosen and close the door. Tape the other end of the string to the center of the door at waist height, then turn off the light. (The

Materials Required:l A sunny dayl Compassl PencilProcedure: On a sunny day, take a compass and pencil outdoors. Allow the compass needle to come to rest, then place the pencil’s eraser at the ‘S’. Tilt the pencil at a 45° angle in line with the needle. Imagine the compass face as the dial of a clock.

Materials Required:l An old nylon stockingl Plastic sandwich bag Procedure: With one hand, hold the toe of a nylon stocking (the shiny kind works best) on the edge of a table. Slip your other hand into the plastic sandwich bag and grip the stocking, starting at the toe and pulling along entire length, up to

Materials Required:l Blackboardl Piece of chalkl Glass windowl An old cloth Procedure:You have probably seen your teacher write with chalk many times, but have you ever thought about the chalk itself? Do you know what makes chalk stick to a surface? For the answer, try this experiment. If you are at school or have a

Materials Required:l Wool sockl Plastic combl Tapel Lightweight thread, about 1 foot long Procedure: Rub a wool sock rapidly back and forth over a plastic comb. Tape the end of the piece of thread to the top of a table. Touch the comb to the free end of the thread and raise the comb. The

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