Recycling Toys and Books Materials Required: Paper and pencil Items collected from friends Is there a “lending library” set up by your teacher in the classroom, wherein you can bring in books and games to lend to others? Some good items for the lending library are books, comics, video-game cartridges, magazines, computer games and videotapes. Before bringing any item to the lending library, children must seek permission from their parents to...

Recyclable Packaging Materials Required: Ten same size aluminium soda cans of different brands (12 ounces) Ten 2-litre soda bottles of different brands Scale Paper and pencil Glass and other packaging materials prove to be costly, so soda comes in thinner recycled glass/plastic bottles and aluminium cans today. Do aluminium soda-can makers use the same amount of metal in all their products? Are some cans heavier than the others? Is the same...

Rate of Evaporation Materials Required: Two 1-pound plastic butter tubs Potted soil Measuring cup Food scale Water Plants need water to survive. Garden plants are watered more often than those that are indoors. Since the sun and air dry the soil, they need more water than potted plants. Fill two 1-pound plastic butter cups with potted soil. Make sure they are loosely packed. With the help of a small food scale,...

Protection from Wind Force Materials Required: An adult A place with many trees An open space, away from trees and buildings Plastic-foam drinking cup Trees seem friendly. They are colourful and appealing. People hang swings from them and birds build nests in them. In destinations facing extreme cold winters, strong winds can make it harder to heat a house. Do trees stop the wind? If trees are planted around a house,...

Predicting the Weather Materials Required: A long thin strip of cloth A 4-feet wooden stake Hammer Magnetic compass A thumbtack Bright colored yarn Four ice cream sticks Outside area Paper and Pencil A barometer is an instrument used for measuring atmospheric pressure, especially in weather forecasting. In general, when the needles of a barometer fall due to a drop in pressure, it indicates bad weather and when there is a rise...

Energy from Storms Materials Required: A storm Pencil and paper An AM radio The earth’s weather system releases tremendous amounts of energy. Lightning and similar weather factors like cyclones and wind conduct tremendous amounts of energy. For example, a lightning bolt can release upto 100 million volts of electricity and reach a temperature of upto 50,000° Fahrenheit. During a storm, the ‘working’ of energy becomes evident. Trees move, sand blows, papers...

Locating Pollutants Materials Required: Two small drinking glasses Pepper Paper coffee filter Water, our basic necessity, is taken for granted by us. Make a list of all the things, in which water is used inside and around your house. Without water, we will not be able to survive. Owing to its importance, we must keep our sources of water clean. Once water is polluted or dirty, it is often hard to...

Levels of Humidity Materials Required: Two rulers Two pieces of cloth, 4 inches (10 cm) square Six thumbtacks 2 pencils Safety scissors Eye-dropper Paper Clock or watch In the air around us, there are tiny droplets of moisture. This moisture in the air is called Humidity. If there is a lot of moisture in the air, we say that the humidity is high. When someone takes a hot shower, the room...