Heat from Radio Waves Materials Required: A microwave oven Two thermometers Pencils A microwave-safe cup Water Microwaves run on electromagnetic waves with the same energy that works in radios and televisions. Only their frequency is much higher. Food in a microwave is generally heated when magnetic waves pass through the substance, causing food molecules to move back and forth very quickly. In this experiment, we shall see how microwaves do not...

Retaining Temperature Materials Required: 1 Salt Two empty Two liter soda bottles Two thermometers Modeling clay Hot tap water A watch Paper and pencil Water takes greater time to change temperature. For example, if the weather has been hot for a few days and for one night it’s pretty cool outside, the warm temperature of a swimming pool will not change much. It will retain its warmth. But does the heat...

Reducing Power Supply Materials Required: 3 ‘D’ flashlight batteries Insulated jumper leads, with alligator clips on both ends Modelling clay Small board Two flashlight bulbs (3 volts) The demand for electricity keeps changing under different circumstances. However, what will happen if a 10 mega-watt power plant tries to give out more energy than its full capacity? Power companies, therefore, decide to regulate demand, by lowering the voltage to meet the demands...

Measuring Electrical Energy Materials Required: Your home’s electrical meter Pencil and paper The unit for measuring electric power is termed as Watt. This is the same measure to differentiate between various bulbs(40W, 60W, 100W), indicating the amount of electric energy needed for the bulb to glow effectively. Have you ever found out how much electricity your house consumes every day? Finding out is very simple. The unit that measures electrical usage...

Energy in Sugar Materials Required: A Trip to the supermarket Pencil and paper Sugar the word sounds so simple, doesn’t it? But did you know that there are various forms of sugar? For instance, sucrose, glucose, fructose (which is found in fruits), lactose (which is present in milk) and maltose. Sugar, when added to food, makes it more delicious, but it should be remembered that too much of sugar, when consumed,...

Insulation Materials Required: Two shoe boxes Adhesive tape Transparent plastic food wraps Scissors Two thermometers Modelling clay Styrofoam sheets, of about 1/2 inch thickness Paper and pencil When houses are made, builders often install a particular thing in houses, which in summers, prevents the cool, air-conditioned air of the rooms to go out and in winters, prevents the room heater’s warm air from escaping. This aspect of house making is known...

Energy from Food Materials Required: Food labels, books, other research materials Paper and pencil Like all appliances and other objects, even the human body needs energy and this energy comes from the food that we consume. Energy that we need is measured as “calories”. Our body needs its daily dose of calories to function properly and to keep us healthy. Different occupations of people ensure that they need different calorie intakes....

Heat Energy Materials Required: Toy Pinwheel Pyrex Beaker Stove Burner One-hole rubber stopper Glass tube bending at 90° Gas converted from water through heat energy is called Steam. This steam can be used for many processes, like in the case of power energy for boats and trains. Electricity can be generated through steam turbines, when the produced steam pressure pushes against the blades which are connected to a shaft. This shaft...