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
This is a simple experiment that shows chemical reactions can produce heat.Things Required:Thermometer, outdoor or cooking typeSmall baby food jarPowdered bleachTeaspoonDirections:Fill the jar with water. Add one teaspoonful of powdered bleach and stir. Insert the thermometer into the liquid. Observe the thermometer every minute for 10 minutes.This Is What Happens:The temperature rises, stops and then
Heat can be generated only with fire. Well you can try this experiment to find the other way to do so.Things Required:1 steel wool pad without soap1/4 cup of vinegarCooking or outdoor thermometer1 jar with lid (The thermometer must fit inside the closed jar.) Directions:Place the thermometer inside the jar and close the lid. Record
A car is called a gas guzzler when it wastes gas. In this experiment, gas wastes water. Try it and see!Things Required:A square piece of coffee filter, about 4″3 teaspoonfuls of baking soda (sodium bicarbonate)A shallow bowl of waterA rubber bandA tall, narrow jar filled with waterPermanent marker penMagnifying hand lensDirections:Place the baking soda in
With this experiment you can make a coin click and dance on the mouth of an empty bottle.Things Required:2-litre soda bottleSmall coinCup of waterDirections:Place the empty, uncapped soda bottle in the freezer for five minutes. Remove the bottle from the freezer and immediately cover the mouth with the wet coin. Wet the coin by dipping