So far you’ve observed what happens when the objects of the same charge are brought together. The two negative balloons repel each other. The positive nylon strips repel each other. But what happens when a negative balloon and a positive strip are brought near each other? Find out in this easy experiment.Things Required:Nylon strip1-foot threadTapeBalloonWoolPlastic […]
Does shooting a billiard ball against the side bumper of a pool table has same effect as a light ray? Find out in this experiment.Things Required:TorchSmall mirrorA rulerTapeDirections:Use tape to place a set of marks along one wall of a hallway or narrow room. Place the first mark 1 foot above the floor. Place the
Do all materials conduct electricity? Let’s find out in this simple experimentThings Required:Spring-type clothespin1 D-cell batteryAluminium foilTorch bulbMasking tapeScissorsTesting materials: rubber band, paper, coins rulerDirections:Cut a rectangle of aluminium foil, 24 inches × 12 inches (60 cm × 30 cm). Fold the aluminium piece in half lengthwise five times to form a thin strip 24
From the previous experiment, we made negative charges transfer onto a balloon when it was rubbed with wool. Because the balloon now has more negative charges than positive charges, it has a net negative charge. This type of “charging” is called contact charging.Contact charging can also produce objects with a positive charge. For an object
Most of the light that strikes a mirrored surface is not absorbed by the material. Instead, this light bounces off the reflective surface. Since the mirror is flat, the light rays are not randomly scattered. Instead, they travel together side-by-side as a reflected beam. The beam keeps travelling on a straight path until it strikes
We all have tube lights everywhere around us, in our homes, schools, etc. But have you ever wondered how a fluorescent tube (light bulb) works.Things Required:BalloonFluorescent tubeDirections:Inflate and tie the balloon. Wash the outside of the fluorescent tube and thoroughly dry. In a dark room, place one end of the tube against the floor. Hold
Things Required:BalloonA piece of wool or feltDirections:Inflate a balloon and stroke it with a piece of wool or felt. If you don’t have any fabric material, you can stroke the balloon against your hair. Place the balloon against the wall. What happens? How long will the balloon cling to the wall? Recharge the balloon and
In this experiment, we will make a simple device that produces side-by-side light beams. By observing the behaviour of these beams, you’ll be able to learn more about the properties of light.Things Required:Index cardCombPair of scissorsTapeTorchMirrorClay Directions:To construct a “ray maker,” cut a rectangular opening in the centre of the long edge of an index
If a chemical change can cause heat (exothermic), can another chemical change make something cold?Things Required:A thermometer1 tablespoonful of Epsom saltsTap water, neither hot nor coldSpoonA medium-size jarPencil and paperDirections:Fill the jar with tap water. Place the thermometer in the water. With your hand, feel the coolness of the jar while you wait until the
We have made Cabbage Indicator, Cabbage litmus paper and now we are going to use it in this experiment to test for the presence of an acid or a base.Things Required:1 cabbage paper strip (prepared in experiment Cabbage Litmus Paper)Cookie sheet1 sheet of notebook paper2 eyedroppersvinegarHousehold ammonia2 small baby food jars Directions:Fill one of the
Can cabbage be used as litmus paper? Find out in this exciting experiment and make a paper indicator that can be used to test for an acid or a base.Things Required:Coffee filtersCabbage indicator juice (Prepared in experiment Cabbage Indicator)Cookie sheetQuart bowlScissorsZip-lock plastic bag Directions:Pour 1 cup of cabbage juice into the bowl. Dip one piece
In this simple experiment, we will make a solution that will indicate the presence of an acid or a base.Things Required:Tea strainer1 tablespoon2 glass quart jars with lids7 quart of distilled waterUncooked purple cabbage Directions:Fill one jar with cabbage leaves that have been torn into small pieces. Heat the distilled water to boiling, and fill
The main purpose of this experiment is to observe the effect that colour has on the amount of radiation that an object absorbs.Things Required:100-watt light sourceBlack construction paperAluminium foilStapler2 outdoor thermometersRulerDirections:Fold the black construction paper over the thermometer as shown and staple the sides. Fold a piece of aluminium foil over the second thermometer. Fold
King Kong’s hand must have been very big to hold a lady in it. Now, you can make your own big hand with just a few simple materials. Without the marker lines, the hand becomes a cow’s udder, the bag under the cow that holds its milk-an utterly fantastic trick!Anyway you look at it, it’s